Post doctoral researcher Alexios Liakos talks to senior researcher Manolis Xylouris, as they track a green comet named Comet C/2022 E3 (ZTF) from the telescope of the Kryoneri observatory, in Kryoneri, Greece, February 1, 2023. REUTERS/Alkis Konstantinidis 

Astronomer and senior researcher of the National Observatory of Athens Alkisti Bonanos speaks with her colleagues as they watch images of a green comet named Comet C/2022 E3 (ZTF), taken from the telescope of the Kryoneri observatory, in Kryoneri, Greece, February 1, 2023. REUTERS/Alkis Konstantinidis 

Astronomer and senior researcher at the National Observatory of Athens Alkisti Bonanos looks at an image of a green comet named Comet C/2022 E3 (ZTF), taken from the telescope of the Kryoneri observatory, in Kryoneri, Greece, February 1, 2023. REUTERS/Alkis Konstantinidis 

Astrophysicist and post doctoral researcher at the National observatory of Athens Sophia Derlopa, operates the telescope of the Kryoneri Observatory, before tracking a green comet named Comet C/2022 E3 (ZTF), in Kryoneri, Greece, February 1, 2023. REUTERS/Alkis Konstantinidis 

French Defence Minister Sebastien Lecornu, Education and Youth Minister Pap Ndiaye and Higher Education and Research Minister Sylvie Retailleau leave following the weekly cabinet meeting and the presentation of a new immigration bill at the Elysee Palace in Paris, France, February 1, 2023. REUTERS/Sarah Meyssonnier 

Canada's Prime Minister Justin Trudeau stands behind a red light from a motorcycle as he speaks at the McMaster Institute for Automotive research on the last of the three day federal cabinet retreat in Hamilton, Ontario, Canada January 25, 2023. REUTERS/Carlos Osorio TPX IMAGES OF THE DAY 

Canada's Prime Minister Justin Trudeau stands behind a red light from a motorcycle as he speaks at the McMaster Institute for Automotive research on the last of the three day federal cabinet retreat in Hamilton, Ontario, Canada January 25, 2023. REUTERS/Carlos Osorio 

Canada's Prime Minister Justin Trudeau tries a car simulator while touring the McMaster Institute for Automotive research on the last of the three day federal cabinet retreat in Hamilton, Ontario, Canada January 25, 2023. REUTERS/Carlos Osorio 

Canada's Prime Minister Justin Trudeau stands behind a red light from a motorcycle as he speaks at the McMaster Institute for Automotive research on the last of the three day federal cabinet retreat in Hamilton, Ontario, Canada January 25, 2023. REUTERS/Carlos Osorio 

Canada's Prime Minister Justin Trudeau speaks at the McMaster Institute for Automotive research on the last of the three day federal cabinet retreat in Hamilton, Ontario, Canada January 25, 2023. REUTERS/Carlos Osorio 

Canada's Prime Minister Justin Trudeau tours the McMaster Institute for Automotive research on the last of the three-day federal cabinet retreat in Hamilton, Ontario, Canada January 25, 2023. REUTERS/Carlos Osorio REFILE - QUALITY REPEAT 

Canada's Prime Minister Justin Trudeau tours the McMaster Institute for Automotive research on the last of the three day federal cabinet retreat in Hamilton, Ontario, Canada January 25, 2023. REUTERS/Carlos Osorio 

Canada's Prime Minister Justin Trudeau tours the McMaster Institute for Automotive research on the last of the three day federal cabinet retreat in Hamilton, Ontario, Canada January 25, 2023. REUTERS/Carlos Osorio 

Canada's Prime Minister Justin Trudeau tours the McMaster Institute for Automotive research on the last of the three day federal cabinet retreat in Hamilton, Ontario, Canada January 25, 2023. REUTERS/Carlos Osorio 

Canada's Prime Minister Justin Trudeau poses with his cabinet ministers at the McMaster Institute for Automotive research on the last of the three day federal cabinet retreat in Hamilton, Ontario, Canada January 25, 2023. REUTERS/Carlos Osorio 

Canada's Prime Minister Justin Trudeau gestures towards his cabinet ministers as he speaks at the McMaster Institute for Automotive research on the last of the three day federal cabinet retreat in Hamilton, Ontario, Canada January 25, 2023. REUTERS/Carlos Osorio 

Canada's Prime Minister Justin Trudeau stands at the McMaster Institute for Automotive research on the last of the three day federal cabinet retreat in Hamilton, Ontario, Canada January 25, 2023. REUTERS/Carlos Osorio 

Canada's Prime Minister Justin Trudeau speaks at the McMaster Institute for Automotive research on the last of the three day federal cabinet retreat in Hamilton, Ontario, Canada January 25, 2023. REUTERS/Carlos Osorio 

Canada's Prime Minister Justin Trudeau tours the McMaster Institute for Automotive research on the last of the three day federal cabinet retreat in Hamilton, Ontario, Canada January 25, 2023. REUTERS/Carlos Osorio 

Canada's Prime Minister Justin Trudeau tours the McMaster Institute for Automotive research on the last of the three day federal cabinet retreat in Hamilton, Ontario, Canada January 25, 2023. REUTERS/Carlos Osorio 

Canada's Prime Minister Justin Trudeau tries a car simulator while touring the McMaster Institute for Automotive research on the last of the three day federal cabinet retreat in Hamilton, Ontario, Canada January 25, 2023. REUTERS/Carlos Osorio 

French Higher Education and Research Minister Sylvie Retailleau and Justice Minister Eric Dupond-Moretti leave following the weekly cabinet meeting and an official presentation of the pension reform plan at the Elysee Palace in Paris, France, January 23, 2023. REUTERS/Benoit Tessier 

French Justice Minister Eric Dupond-Moretti, Higher Education and Research Minister Sylvie Retailleau, Minister for Energy Transition Agnes Pannier-Runacher and Prime Minister Elisabeth Borne leave following the weekly cabinet meeting and an official presentation of the pension reform plan at the Elysee Palace in Paris, France, January 23, 2023. REUTERS/Benoit Tessier 

U.S. President Joe Biden greets Governor of California Gavin Newsom, Rep. Anna Eshoo, and David Korsmeyer, Associate Center Director for Research and Technology, National Aeronautics and Space Administration (NASA), as he arrives at Moffett Field prior to surveying storm-damaged areas of California's central coast, in Mountain View, California, U.S., January 19, 2023. REUTERS/Leah Millis 

Roman Shimonov, founder and CEO, speaks with Dmitry Gorin, head of research and development, at vehicle manufacturer Roshel, after Canada's defence minister announced the supply of 200 Senator armored personnel carriers to Ukraine, as part of a new package of military assistance, in Mississauga, Ontario, Canada January 19, 2023. REUTERS/Carlos Osorio 

A general view of camp beds, during a protest action with claims of more expansion of biomedical research related to post-COVID-19 long-term conditions in front of the Reichstag building, the seat of the lower house of parliament Bundestag in Berlin, Germany January 19, 2023. REUTERS/Annegret Hilse 

A general view of a camp bed with a pinned poster, during a protest action with claims of more expansion of biomedical research related to post-COVID-19 long-term conditions in front of the Reichstag building, the seat of the lower house of parliament Bundestag in Berlin, Germany January 19, 2023. REUTERS/Annegret Hilse 

A general view of camp beds, during a protest action with claims of more expansion of biomedical research related to post-COVID-19 long-term conditions in front of the Reichstag building, the seat of the lower house of parliament Bundestag in Berlin, Germany January 19, 2023. REUTERS/Annegret Hilse 

A general view of camp beds with pinned posters, during a protest action with claims of more expansion of biomedical research related to post-COVID-19 long-term conditions in front of the Reichstag building, the seat of the lower house of parliament Bundestag in Berlin, Germany January 19, 2023. REUTERS/Annegret Hilse 

President of the European Research Council Maria Leptin, CEO of Gavi, the Vaccine Alliance Seth Berkley, Dean of the Faculty, Harvard T.H. Chan School of Public Health Michelle Williams and CEO of Moderna Stephane Bancel attend the session "State of the Pandemic" during the World Economic Forum (WEF) in Davos, Switzerland, January 18, 2023. REUTERS/Arnd Wiegmann 

Community guide Manuel Centeno shows a map of the archaeological site El Mirador where a team from Guatemala's FARES anthropological research foundation has revealed in a new high-tech study that nearly 1,000 ancient Maya settlements, including 417 previously unknown sites linked by what may be the world's first highway network, are hidden by the dense jungles of northern Guatemala and southern Mexico, in Peten, Guatemala, January 17, 2023. REUTERS/Josue Decavele 

A community guide leads mules in a camp of the archaeological site El Mirador where a team from Guatemala's FARES anthropological research foundation has revealed in a new high-tech study that nearly 1,000 ancient Maya settlements, including 417 previously unknown sites linked by what may be the world's first highway network, are hidden by the dense jungles of northern Guatemala and southern Mexico, in Peten, Guatemala, January 17, 2023. REUTERS/Josue Decavele 

A spider monkey is painted on a wall at the camp of the archaeological site El Mirador where a team from Guatemala's FARES anthropological research foundation has revealed in a new high-tech study that nearly 1,000 ancient Maya settlements, including 417 previously unknown sites linked by what may be the world's first highway network, are hidden by the dense jungles of northern Guatemala and southern Mexico, in Peten, Guatemala, January 17, 2023. REUTERS/Josue Decavele 

LiDAR technology expert Josephine Thompson explains the new discoveries in La Danta temple at the archaeological site El Mirador where a team from Guatemala's FARES anthropological research foundation has revealed in a new high-tech study that nearly 1,000 ancient Maya settlements, including 417 previously unknown sites linked by what may be the world's first highway network, are hidden by the dense jungles of northern Guatemala and southern Mexico, in Peten, Guatemala, January 17, 2023. REUTERS/Josue Decavele 

A Mayan figurehead carved on stone at Temple 313 is seen at the archaeological site El Mirador where a team from Guatemala's FARES anthropological research foundation has revealed in a new high-tech study that nearly 1,000 ancient Maya settlements, including 417 previously unknown sites linked by what may be the world's first highway network, are hidden by the dense jungles of northern Guatemala and southern Mexico, in Peten, Guatemala, January 17, 2023. REUTERS/Josue Decavele 

Community guide Manuel Centeno shows a detail of the Jaguar Paw Temple at the archaeological site El Mirador where a team from Guatemala's FARES anthropological research foundation has revealed in a new high-tech study that nearly 1,000 ancient Maya settlements, including 417 previously unknown sites linked by what may be the world's first highway network, are hidden by the dense jungles of northern Guatemala and southern Mexico, in Peten, Guatemala, January 17, 2023. REUTERS/Josue Decavele 

The jungle is seen through a hole in the Jaguar Paw Temple at the archaeological site El Mirador where a team from Guatemala's FARES anthropological research foundation has revealed in a new high-tech study that nearly 1,000 ancient Maya settlements, including 417 previously unknown sites linked by what may be the world's first highway network, are hidden by the dense jungles of northern Guatemala and southern Mexico, in Peten, Guatemala, January 17, 2023. REUTERS/Josue Decavele 

Jorge Velazquez prepares food at the camp of the archaeological site El Mirador where a team from Guatemala's FARES anthropological research foundation has revealed in a new high-tech study that nearly 1,000 ancient Maya settlements, including 417 previously unknown sites linked by what may be the world's first highway network, are hidden by the dense jungles of northern Guatemala and southern Mexico, in Peten, Guatemala, January 17, 2023. REUTERS/Josue Decavele 

A Guatemalan flag it's pinned next to a map of the archaeological site El Mirador where a team from Guatemala's FARES anthropological research foundation has revealed in a new high-tech study that nearly 1,000 ancient Maya settlements, including 417 previously unknown sites linked by what may be the world's first highway network, are hidden by the dense jungles of northern Guatemala and southern Mexico, in Peten, Guatemala, January 17, 2023. REUTERS/Josue Decavele 

A boat navigates the Peten Izta lake near the archaeological site El Mirador where a team from Guatemala's FARES anthropological research foundation has revealed in a new high-tech study that nearly 1,000 ancient Maya settlements, including 417 previously unknown sites linked by what may be the world's first highway network, are hidden by the dense jungles of northern Guatemala and southern Mexico, in Peten, Guatemala, January 17, 2023. REUTERS/Josue Decavele 

A general view shows the jungle surrounding the archaeological site El Mirador where a team from Guatemala's FARES anthropological research foundation has revealed in a new high-tech study that nearly 1,000 ancient Maya settlements, including 417 previously unknown sites linked by what may be the world's first highway network, are hidden by the dense jungles of northern Guatemala and southern Mexico, in Peten, Guatemala, January 17, 2023. REUTERS/Josue Decavele 

A view shows La Danta pyramid at the archaeological site El Mirador where a team from Guatemala's FARES anthropological research foundation has revealed in a new high-tech study that nearly 1,000 ancient Maya settlements, including 417 previously unknown sites linked by what may be the world's first highway network, are hidden by the dense jungles of northern Guatemala and southern Mexico, in Peten, Guatemala, January 17, 2023. REUTERS/Josue Decavele 

A man is silhouetted while standing near La Danta pyramid at the archaeological site El Mirador where a team from Guatemala's FARES anthropological research foundation has revealed in a new high-tech study that nearly 1,000 ancient Maya settlements, including 417 previously unknown sites linked by what may be the world's first highway network, are hidden by the dense jungles of northern Guatemala and southern Mexico, in Peten, Guatemala, January 17, 2023. REUTERS/Josue Decavele 

A structure protects the Popol Vuh frieze at the archeological site El Mirador where a team from Guatemala's FARES anthropological research foundation has revealed in a new high-tech study that nearly 1,000 ancient Maya settlements, including 417 previously unknown sites linked by what may be the world's first highway network, are hidden by the dense jungles of northern Guatemala and southern Mexico, in Peten, Guatemala, January 17, 2023. REUTERS/Josue Decavele 

A section of the Popol Vuh frieze is seen at the archeological site El Mirador where a team from Guatemala's FARES anthropological research foundation has revealed in a new high-tech study that nearly 1,000 ancient Maya settlements, including 417 previously unknown sites linked by what may be the world's first highway network, are hidden by the dense jungles of northern Guatemala and southern Mexico, in Peten, Guatemala, January 17, 2023. REUTERS/Josue Decavele 

Community guide Manuel Centeno observes a section of the Popol Vuh frieze at the archeological site El Mirador where a team from Guatemala's FARES anthropological research foundation has revealed in a new high-tech study that nearly 1,000 ancient Maya settlements, including 417 previously unknown sites linked by what may be the world's first highway network, are hidden by the dense jungles of northern Guatemala and southern Mexico, in Peten, Guatemala, January 17, 2023. REUTERS/Josue Decavele 

Scripps Institution of Oceanography at the University of California San Diego use a research vehicle with lasers to track beach erosion along San Diego's coast following major winter storms in coastline in San Diego, California, U.S., January 17, 2023. REUTERS/Mike Blake 

Scripps Institution of Oceanography at the University of California San Diego use a research vehicle with lasers to track beach erosion along San Diego's coast following major winter storms in coastline in San Diego, California, U.S., January 17, 2023. REUTERS/Mike Blake 

Canadian Prime Minister Justin Trudeau tours the CHARGE department (Centre for Hybrid Automotive Research and Green Energy) with Professor Narayan C. Car at the University of Windsor in Windsor, Ontario, Canada. January 17, 2023. REUTERS/Rebecca Cook 

Canadian Prime Minister Justin Trudeau listens to a student during a tour of the CHARGE department (Centre for Hybrid Automotive Research and Green Energy) with Professor Narayan C. Car at the University of Windsor in Windsor, Ontario, Canada, January 17, 2023. REUTERS/Rebecca Cook 

Canadian Prime Minister Justin Trudeau listens to a student during a tour of the CHARGE department (Centre for Hybrid Automotive Research and Green Energy) with Professor Narayan C. Car at the University of Windsor in Windsor, Ontario, Canada. January 17, 2023. REUTERS/Rebecca Cook 

Canadian Prime Minister Justin Trudeau tours the CHARGE department (Centre for Hybrid Automotive Research and Green Energy) with Professor Narayan C. Car at the University of Windsor in Windsor, Ontario, Canada. January 17, 2023. REUTERS/Rebecca Cook 

Canadian Prime Minister Justin Trudeau tours the CHARGE department (Centre for Hybrid Automotive Research and Green Energy) with Professor Narayan C. Car at the University of Windsor in Windsor, Ontario, Canada. January 17, 2023. REUTERS/Rebecca Cook 

Canadian Prime Minister Justin Trudeau listens to a student during a tour of the CHARGE department (Centre for Hybrid Automotive Research and Green Energy) with Professor Narayan C. Car at the University of Windsor in Windsor, Ontario, Canada. January 17, 2023.REUTERS/Rebecca Cook 

Canadian Prime Minister Justin Trudeau tours the CHARGE department (Centre for Hybrid Automotive Research and Green Energy) with Professor Narayan C. Car at the University of Windsor in Windsor, Ontario, Canada. January 17, 2023. REUTERS/Rebecca Cook 

Canadian Prime Minister Justin Trudeau listens to a student at the CHARGE department (Centre for Hybrid Automotive Research and Green Energy) at the University of Windsor in Windsor, Ontario, Canada. January 17, 2023. REUTERS/Rebecca Cook 

French Minister for Ecological Transition and Territories' Cohesion Christophe Bechu, French Labour Minister Olivier Dussopt, French Interior Minister Gerald Darmanin, French Prime Minister Elisabeth Borne, French Justice Minister Eric Dupond-Moretti, French Higher Education and Research Minister Sylvie Retailleau, French Culture Minister Rima Abdul-Malak, French Junior Minister for Public Accounts Gabriel Attal, French Secretary of State for Rurality Dominique Faure and French Junior Minister for Cities and Housing Olivier Klein attend the traditional breakfast at the Ministry of the Interior, Place Beauvau in Paris, France on January 4, 2023. Alain Jocard/Pool via REUTERS 

French Junior Minister for the Relations with the Parliament Franck Riester, French Minister for Solidarity, Autonomy and Persons with Disabilities Jean-Christophe Combe, French Minister for Ecological Transition and Territories' Cohesion Christophe Bechu, French Labour Minister Olivier Dussopt, French Interior Minister Gerald Darmanin, French Prime Minister Elisabeth Borne, French Justice Minister Eric Dupond-Moretti, French Higher Education and Research Minister Sylvie Retailleau, French Culture Minister Rima Abdul-Malak, French Junior Minister for Public Accounts Gabriel Attal, French Secretary of State for Rurality Dominique Faure, French Junior Minister for Cities and Housing Olivier Klein, French Secretary of State for Youth Sarah El Hairy, French Secretary of State for Social Economy and Associations Marlene Schiappa and French Secretary of State for Childhood Charlotte Caubel attend the traditional breakfast at the Ministry of the Interior, Place Beauvau in Paris, France on January 4, 2023. Alain Jocard/Pool via REUTERS 

French Labour Minister Olivier Dussopt, French Interior Minister Gerald Darmanin, French Prime Minister Elisabeth Borne, French Justice Minister Eric Dupond-Moretti, French Higher Education and Research Minister Sylvie Retailleau, French Culture Minister Rima Abdul-Malak and French Sports Minister Amelie Oudea-Castera attend the traditional breakfast at the Ministry of the Interior, Place Beauvau in Paris, on January 4, 2023. Alain Jocard/Pool via REUTERS 

French Minister for Ecological Transition and Territories' Cohesion Christophe Bechu , French Labour Minister Olivier Dussopt , French Interior Minister Gerald Darmanin, French Prime Minister Elisabeth Borne, French Justice Minister Eric Dupond-Moretti, French Higher Education and Research Minister Sylvie Retailleau, French Junior Minister for Public Accounts Gabriel Attal, French Secretary of State for Rurality Dominique Faure, attend the traditional breakfast at the Ministry of the Interior, Place Beauvau in Paris, on January 4, 2023. Alain Jocard/Pool via REUTERS