An employee uses tweezers to sort through caviar on the processing line at the Acipenser fish farm in Ambatolaona, Madagascar, September 10, 2019. Picture taken September 10, 2019. REUTERS/Baz Ratner

A man uses a pair of tweezers to remove hair from his beard in his shop in Sinagar March 3, 2019. REUTERS/Danish Ismail

Arthur Ashkin, who won the 2018 Physics Nobel Prize for inventing "optical tweezers", poses in his home in Rumson, New Jersey, U.S., October 2, 2018. REUTERS/Brendan McDermid

Arthur Ashkin, who won the 2018 Physics Nobel Prize for inventing "optical tweezers", poses with his wife Aline in their home in Rumson, New Jersey, U.S., October 2, 2018. REUTERS/Brendan McDermid

Arthur Ashkin, who won the 2018 Physics Nobel Prize for inventing "optical tweezers", poses in his home in Rumson, New Jersey, U.S., October 2, 2018. REUTERS/Brendan McDermid

Arthur Ashkin, who won the 2018 Physics Nobel Prize for inventing "optical tweezers", poses in his home in Rumson, New Jersey, U.S., October 2, 2018. REUTERS/Brendan McDermid

Arthur Ashkin, who won the 2018 Physics Nobel Prize for inventing "optical tweezers", poses in his home in Rumson, New Jersey, U.S., October 2, 2018. REUTERS/Brendan McDermid

Arthur Ashkin, who won the 2018 Physics Nobel Prize for inventing "optical tweezers", poses in his home in Rumson, New Jersey, U.S., October 2, 2018. REUTERS/Brendan McDermid

Arthur Ashkin, who won the 2018 Physics Nobel Prize for inventing "optical tweezers", poses in his home in Rumson, New Jersey, U.S., October 2, 2018. REUTERS/Brendan McDermid

Arthur Ashkin, who won the 2018 Physics Nobel Prize for inventing "optical tweezers", poses in his home in Rumson, New Jersey, U.S., October 2, 2018. REUTERS/Brendan McDermid

Arthur Ashkin, who won the 2018 Physics Nobel Prize for inventing "optical tweezers", poses in his home in Rumson, New Jersey, U.S., October 2, 2018. REUTERS/Brendan McDermid

Arthur Ashkin, who won the 2018 Physics Nobel Prize for inventing "optical tweezers", poses in his home in Rumson, New Jersey, U.S., October 2, 2018. REUTERS/Brendan McDermid

Arthur Ashkin, who won the 2018 Physics Nobel Prize for inventing "optical tweezers", poses in his home in Rumson, New Jersey, U.S., October 2, 2018. REUTERS/Brendan McDermid

Arthur Ashkin, who won the 2018 Physics Nobel Prize for inventing "optical tweezers", poses in his home in Rumson, New Jersey, U.S., October 2, 2018. REUTERS/Brendan McDermid

Arthur Ashkin, who won the 2018 Nobel Prize for Physics for inventing "optical tweezers" poses in his home in Rumson, New Jersey, U.S., October 2, 2018. REUTERS/Brendan McDermid

Arthur Ashkin, who won the 2018 Nobel Prize for Physics for inventing "optical tweezers" poses in his home in Rumson, New Jersey, U.S., October 2, 2018. REUTERS/Brendan McDermid

Stjepan Biletic calks a decorated egg with small horseshoes in his workshop in Kresevo, Bosnia and Herzegovina, April 13, 2017. Picture is taken April 13. REUTERS/Dado Ruvic

A Cuban migrant removes hair from her face at a temporary shelter in a school in the town of La Cruz, Costa Rica, near the border with Nicaragua, November 17, 2015. More than a thousand Cuban migrants hoping to make it to the United States were stranded in the border town of Penas Blancas, Costa Rica, on Monday after Nicaragua closed its border on November 15, 2015 stoking diplomatic tensions over a growing wave of migrants making the journey north from the Caribbean island. REUTERS/Juan Carlos Ulate

Artist Jim Bachor uses tweezers for detailed adjustments to his mosaic art piece "Twin Lime Popsicles" installed in a street pothole in Chicago, Illinois, May 1, 2015. It took Bachor about 8 hours to create the piece from marble and glass tiles. Picture taken May 1, 2015. REUTERS/Jim Young

Yoshihiro Narisawa, the owner and chef of Tokyo's French restaurant Narisawa, uses tweezers to decorate a dish called "Five flavors", for an early spring menu which includes Akaza Ebi, or langoustine shrimp, from Suruga Bay in central Japan, accented with "green caviar" of various green peas, along with the petals of rucola flowers and viola, at the kitchen of Narisawa in Tokyo March 26, 2015. Chef Yoshihiro Narisawa, the owner of Narisawa, serves sake with his dishes because he believes the finest local ingredients go well with the local alcoholic drink. Narisawa, ranked among the top restaurants in the world and considered Tokyo's finest French eatery, serves more than 60 types of sake with the dishes on its menu. Picture taken March 26, 2015. To match World Chefs - FOOD-CHEFS/NARISAWA REUTERS/Yuya Shino?

A worker uses tweezers to remove feathers from a bird's nest at a processing plant in Kuala Lumpur, February 17, 2015. Prized in China for is alleged health benefits for hundreds of years, nests made from swiftlets' saliva are being mixed into coffee and cereal as the Southeast Asian producers of the delicacy seek to broaden its appeal, and their profit margins. The nests are among the world's most expensive foods, selling for up to $2,500 a kg and the swiftlets that weave them are indigenous to Indonesia, Malaysia, Thailand and Vietnam. Picture taken February 17, 2015. REUTERS/Olivia Harris (MALAYSIA - Tags: BUSINESS ANIMALS FOOD)

A worker uses tweezers to remove feathers from a bird's nest at a processing plant in Kuala Lumpur, February 17, 2015. Prized in China for is alleged health benefits for hundreds of years, nests made from swiftlets' saliva are being mixed into coffee and cereal as the Southeast Asian producers of the delicacy seek to broaden its appeal, and their profit margins. The nests are among the world's most expensive foods, selling for up to $2,500 a kg and the swiftlets that weave them are indigenous to Indonesia, Malaysia, Thailand and Vietnam. Picture taken February 17, 2015. REUTERS/Olivia Harris (MALAYSIA - Tags: BUSINESS ANIMALS FOOD)

Physicist Urs Duerig uses tweezers to hold a silicon tip with a sharp apex, 100,000 times smaller than a sharpened pencil, of a prototype of an IBM NanoFrazor 3D nano printing tool at a laboratory of IBM Research in Rueschlikon, near Zurich April 23, 2014. A laboratory in Switzerland has created the smallest magazine cover in the world, using a tiny chisel to create an image so minute that 2,000 of them could fit on a grain of salt. Scientists carved the 11x14-micrometre image of two pandas that appeared on last month's cover of the National Geographic Kids magazine onto a polymer using technology similar to 3D printing. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SCIENCE TECHNOLOGY)

Bee expert Edit Zajacz holds up a dead bee she had picked out for inspection to determine the cause of its death at the Apiarian Research Centre in Godollo, 25 km east of the Hungarian capital Budapest, on June 5, 2013. Picture taken July 5, 2013. REUTERS/Laszlo Balogh (HUNGARY - Tags: ENVIRONMENT ANIMALS)

An employee uses tweezers to hold special edition postage stamps depicting Serbian and EU flags, as Serbia begins talks in Brussels on joining the European Union, in Belgrade January 21, 2014. The launch of talks follows a sea-change in official Serbian policy towards its former Kosovo province, with an EU-brokered accord in April, under which Belgrade agreed to help end Kosovo's de facto ethnic partition by ceding control over the mainly Serb north. REUTERS/Marko Djurica (SERBIA - Tags: POLITICS SOCIETY)

A master glassmaker uses tweezers to create a handmade horse glass at the Royal Crystal Factory in La Granja de San Ildefonso, near Madrid, November 12, 2013. Picture taken November 12, 2013. REUTERS/Sergio Perez (SPAIN - Tags: SOCIETY TPX IMAGES OF THE DAY)

A Rio Tinto pink diamond is displayed along with tweezers and a magnifier in Hong Kong September 6, 2013. The Argyle Pink Diamond Tender, showcasing the finest coloured diamonds from Rio Tinto Ltd's mine in northwest Australia, opens its doors to about 100 carefully selected gem enthusiasts in Hong Kong this week. Picture taken September 6, 2013. REUTERS/Bobby Yip (CHINA - Tags: BUSINESS SOCIETY WEALTH)

Employee Irmgard Hess puts in a sample of minced meat in a test tube in the food control laboratory institute Eurofins in Ebersberg, eastward of Munich February 18, 2013. The samples of minced meat are tested for the presence of horse meat as a precaution. REUTERS/Michaela Rehle (GERMANY - Tags: AGRICULTURE BUSINESS FOOD POLITICS)

A worker puts toothpicks and tweezers into Swiss army pocket knives at the production facility of Swiss knife manufacturer Victorinox in the village of Ibach near Schwyz May 15, 2012. Workers at the Victorinox factory, founded in 1884, produce 28,000 Swiss Army Knives a day, many hand-assembled. In addition, the factory's almost 900 workers turn out 32,000 other tools and 60,000 knives for household an professional use. Picture taken on May 15, 2012. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS EMPLOYMENT)

The surfaces of a diamond are visible in a magnifying glass held using tweezers at Serendip Jewellers in the Hatton Garden Jewellery Emporium in London April 2, 2012. A stock market flotation is likely to top the list of options when Rio Tinto reviews the future of its diamond business, as a shortage of heavyweight buyers prompts the miner to turn instead to funds betting on Asia's appetite for luxury. The Anglo-Australian mining giant could add to the allure of an initial public offering by first seeking to merge its diamond operation with another that is on the block from rival BHP Billiton, bankers and analysts said. Picture taken April 2, 2012. To match Story US-DIAMONDS/ REUTERS/Luke MacGregor (BRITAIN - Tags: BUSINESS)

A jeweller holds a diamond using tweezers at Serendip Jewellers in the Hatton Garden Jewellery Emporium in London April 2, 2012. A stock market flotation is likely to top the list of options when Rio Tinto reviews the future of its diamond business, as a shortage of heavyweight buyers prompts the miner to turn instead to funds betting on Asia's appetite for luxury. The Anglo-Australian mining giant could add to the allure of an initial public offering by first seeking to merge its diamond operation with another that is on the block from rival BHP Billiton, bankers and analysts said. Picture taken April 2, 2012. To match Story US-DIAMONDS/ REUTERS/Luke MacGregor (BRITAIN - Tags: BUSINESS)

Israeli diamantaire Avraham Eshed uses a pair of tweezers to hold a diamond at the Israel Diamond Exchange in Ramat Gan near Tel Aviv December 15, 2009. REUTERS/Gil Cohen Magen (ISRAEL - Tags: BUSINESS)

A hearing impaired Palestinian boy receives treatment with bee venom at a clinic in Gaza City July 8, 2009. REUTERS/Ibraheem Abu Mustafa (GAZA HEALTH)

Palestinian women work at a pastry factory in Khan Younis in the southern Gaza Strip June 25, 2009. REUTERS/Ibraheem Abu Mustafa (GAZA SOCIETY FOOD)

Diamonds are displayed at the certification level of the World Diamond Centre in Antwerp February 5, 2009. It wouldn't be fitting to mount a barrage of "sale" and "special offer" signs in the windows of jewellers crowded into Antwerp's diamond square mile. But traders, cutters and retailers say business is terrible. Just a handful of diamonds can be worth a fortune, so the diamond industry -- centred since the 16th century on the Belgian port city of Antwerp -- has for years depended on debt. Now plunging demand, falling prices and lender reticence have left it looking uncomfortably overdrawn. To match feature FINANCIAL-DIAMONDS/ REUTERS/Yves Herman (BELGIUM)
BUSINESS SOCIETY)

A worker assesses the quality of a diamond before certification at the World Diamond Centre in Antwerp February 5, 2009. It wouldn't be fitting to mount a barrage of "sale" and "special offer" signs in the windows of jewellers crowded into Antwerp's diamond square mile. But traders, cutters and retailers say business is terrible. Just a handful of diamonds can be worth a fortune, so the diamond industry -- centred since the 16th century on the Belgian port city of Antwerp -- has for years depended on debt. Now plunging demand, falling prices and lender reticence have left it looking uncomfortably overdrawn. To match feature FINANCIAL-DIAMONDS/ REUTERS/Yves Herman (BELGIUM)

A diamond businessmen desmonstrates a process at a diamond cutting and polishing factory in Surat in the western Indian state of Gujarat March 3, 2009. Hundreds of factories shut down in India's diamond hub, as demand for the gems dipped in the United States and Western Europe, leaving more than 100,000 workers without jobs. The woes of Surat reflect a wider downturn for India's export sector, which accounts for a fifth of Asia's third largest economy. Exports have fallen four months in a row and the latest data available shows a slide of 16 percent in January. To match feature INDIA-DIAMONDS/ REUTERS/Arko Datta (INDIA BUSINESS)

A staff member of the Glamour Eye Salon undergoes an eyelash extension treatment in Tokyo December 4, 2008. From twentysomethings trying to emulate wide-eyed manga heroines to middle-aged housewives seeking an elegant look that lasts, Japanese women are turning to the latest in luscious lashes -- artificial extensions. Photo taken December 4, 2008. REUTERS/Yuriko Nakao (JAPAN)

A staff member of the Glamour Eye Salon undergoes an eyelash extension treatment in Tokyo December 4, 2008. From twentysomethings trying to emulate wide-eyed manga heroines to middle-aged housewives seeking an elegant look that lasts, Japanese women are turning to the latest in luscious lashes -- artificial extensions. Photo taken December 4, 2008. REUTERS/Yuriko Nakao (JAPAN)

An Algordanza employee shows an example of a diamond next to ashes in Chur August 8, 2008. The small company, based in the mountainous southeast Switzerland, uses the ashes of dead people to make diamonds, as a permanent memento for their nearest and dearest. To match feature SWISS-DIAMONDS REUTERS/Christian Hartmann (SWITZERLAND)

A craftsman examines a watch at the official opening of the Omega Pavilion ahead of the Beijing 2008 Olympic Games August 4, 2008. REUTERS/Claro Cortes Iv (CHINA)

An employee at a diamond merchant's workshop inspects diamonds while grading them in Mumbai April 30, 2008. Mumbai's diamond traders are moving to a new exchange where they hope to rival Belgium's Antwerp as the world's diamond trading capital. To match feature INDIA-DIAMONDS REUTERS/Arko Datta (INDIA)

An employee at a diamond merchant's workshop inspects diamonds while grading them in Mumbai April 30, 2008. Mumbai's diamond traders are moving to a new exchange where they hope to rival Belgium's Antwerp as the world's diamond trading capital. To match feature INDIA-DIAMONDS REUTERS/Arko Datta (INDIA)

A group of Dutch doctors and nurses who are part of the medical staff of the Role 3 Multinational Medical Unit perform a surgery at the field hospital at the Kandahar Airfield May 25, 2008. Photo taken on May 25, 2008. REUTERS/Peter Andrews (AFGHANISTAN)

A watchmaker holds a piece of silicium on which messages and even photographs can be engraved before inserting it into the "Titanic DNA" model of Swiss watchmaker Romain Jerome in Geneva March 27, 2008. The "Titanic DNA" integrates an authentic part of the Titanic ocean liner drawn from the ocean floor. Picture taken March 27, 2008. REUTERS/Denis Balibouse (SWITZERLAND) FOR BEST QUALITY IMAGE: ALSO SEE GM1E73P1IAV01.

Competitors apply makeup backstage before the "Miss Germany 2008" gala in the southern German town of Rust February 2, 2008. REUTERS/Alex Grimm (GERMANY)

An employee arranges gold links for making a chain at Exportadores Bolivianos jewellery factory in La Paz January 11, 2008. The factory exports nearly all its merchandise to the United States, which has given the Andean country generous trade preferences that are set to expire in February. The factory's owner, Eduardo Bracamonte, says Bolivians will suffer if the U.S. fails to renew the trade preferences, and that some Bolivian companies may move to Chile or Peru if the business climate under leftist President Evo Morales deteriorates. REUTERS/David Mercado (BOLIVIA)

A worker puts toothpicks and tweezers into Swiss army pocket knifes at the production facility of Swiss knife manufacturer Victorinox in the village of Ibach near Schwyz December 4, 2007. Workers at the Victorinox factory, founded in 1884, produce 28,000 Swiss Army Knives a day, many hand-assembled. In addition, the factory?s almost 1,000 workers turn out 32,000 other tools and 60,000 kitchen and butchers? knives. REUTERS/Arnd Wiegmann (SWITZERLAND) TO ACCOMPANY FEATURE SWISS-KNIFE/

A worker puts toothpicks and tweezers into Swiss army pocket knifes at the production facility of Swiss knife manufacturer Victorinox in the village of Ibach near Schwyz December 4, 2007. Workers at the Victorinox factory, founded in 1884, produce 28,000 Swiss Army Knives a day, many hand-assembled. In addition, the factory?s almost 1,000 workers turn out 32,000 other tools and 60,000 kitchen and butchers? knives. Picture taken December 4. TO ACCOMPANY FEATURE SWISS-KNIFE/ REUTERS/Arnd Wiegmann (SWITZERLAND)

A worker displays fake eyelashes at a factory in Purbalingga, in Indonesia's Central Java province, November 23, 2007. JLo has fluttered them. Madonna has batted them. Sequined, crystallised, befeathered or just plain, if you've ever stuck on fake eyelashes, chances are they were made in Indonesia. Picture taken on November 23, 2007. REUTERS/Beawiharta (INDONESIA)

A worker puts fake eyelashes into plastic packaging at a factory in Purbalingga, in Indonesia's Central Java province, November 23, 2007. JLo has fluttered them. Madonna has batted them. Sequined, crystallised, befeathered or just plain, if you've ever stuck on fake eyelashes, chances are they were made in Indonesia. Picture taken on November 23, 2007. REUTERS/Beawiharta (INDONESIA)

A veterinarian helps an Andean condor chick hatch after 57 days of incubation at the Buenos Aires Zoo, December 5, 2007. The chick, given the name of Pacha Kawaj in the Quechua language, was born from an egg under the care of the Bioandina Argentina Foundation, whose mission is to release the bird into the wild after one year of age. REUTERS/Martin Acosta (ARGENTINA)

Korean plastic surgeon Kim Byung-gun explains the so-called "double eyelid surgery", which adds a crease to the eyelids to make the eyes appear larger, for Zhang Ding Ling during a consulting session in his clinic in Shanghai November 4, 2007. Zhang received the procedure as a present from her parents for her 23rd birthday. Chinese government officials estimate that $2.4 billion was spent last year on plastic surgery procedures, with 1 million operations taking place. Double eyelid surgery is the most popular cosmetic procedure in China. Picture taken November 4, 2007. REUTERS/Nir Elias (CHINA)

Worker Solomon Conteh picks up a mosquito at Sanaria Inc. facility in Rockville, Maryland, October 26, 2007. The insects in the facility are dissected for the motherlode that they carry -- baby malaria parasites, with which founder and chief executive officer Dr. Stephen Hoffman hopes he can do what has been impossible -- make a vaccine against malaria. REUTERS/Jim Young (UNITED STATES)

Worker Solomon Conteh dissects a mosquito at Sanaria Inc. facility in Rockville, Maryland, October 26, 2007. The insects are dissected for the motherlode that they carry -- baby malaria parasites, with which founder and chief executive officer Dr. Stephen Hoffman hopes he can do what has been impossible -- make a vaccine against malaria. REUTERS/Jim Young (UNITED STATES)

Korean plastic surgeon Kim Byung-gun (not pictured) demonstrates the so-called "double eyelid surgery", which adds a crease to the eyelids to make the eyes appear larger, for a patient during a consulting session in his clinic in Shanghai September 16, 2007. Kim, who runs South Korea's largest plastic surgery hospital BK Clinic and is one of the country's most successful surgeons, envisaged a bonanza in China after noting that 40 Chinese women a month were flying to his Seoul clinic for cosmetic surgery. Chinese government officials estimate that $2.4 billion was spent last year on plastic surgery procedures, with 1 million operations taking place. REUTERS/Nir Elias (CHINA)

A participant uses training units for coronary artery bypass surgery at the Robotics Boot Camp event at a Waseda University campus in Tokyo August 5, 2007. The event is organised for school and university students, as part of Waseda University's 21st Century Centre of Excellence (COE) Programme "The innovative research on symbiosis technologies for human and robots in the elderly dominated society", to understand robotic technology by using the latest robots, the organiser said. REUTERS/Kiyoshi Ota (JAPAN)

Park Young-kwang (L), a doctoral course postgraduate of Waseda University, helps a participant in using training units for coronary artery bypass surgery at the Robotics Boot Camp event at a Waseda University campus in Tokyo August 5, 2007. The event is organised for school and university students, as part of Waseda University's 21st Century Centre of Excellence (COE) Programme "The innovative research on symbiosis technologies for human and robots in the elderly dominated society", to understand robotic technology by using the latest robots, the organiser said. REUTERS/Kiyoshi Ota (JAPAN)

A man holds tweezers while repairing a watch at his workshop in Srinagar July 24, 2007. REUTERS/Fayaz Kabli (INDIAN ADMINISTERED KASHMIR)

A man wears a magnifying glass on his right eye as he repairs a watch at his workshop in Srinagar July 24, 2007. REUTERS/Fayaz Kabli (INDIAN ADMINISTERED KASHMIR)