Howard Hughes Medical Institute

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In this Feb. 19, 2019 photo, the bones of an animal lie on a rock during a scientific mission to study how temperatures and plant life are changing in the Andean ecosystem known as the paramos _ a mist-covered mountain grassland that lies between the top of the treeline and the bottom of the Humboldt glacier, in Merida, Venezuela. A team of scientists in Venezuela is trying to weather the political and economic crisis engulfing their country to record what happens as Venezuela's last glacier vanishes. (AP Photo/Rodrigo Abd)

Hardy scientists trek to Venezuela’s last glacier amid chaos

By CHRISTINA LARSON and FEDERICA NARANCIO - Associated Press

Nicholas Bingham enters the water to go night spearfishing, which is banned, especially in the sanctuaries set up to protect the island's endangered coral reefs and replenish fish stocks, in Stewart Town, Jamaica, Friday, Feb. 15, 2019. The restrictions have taken a toll on many Jamaicans' livelihoods, in a place where jobs can be scarce. In some places, fishermen have joined with local businesses to form marine associations and negotiate a no-fishing zone. But that simple line in the water must be enforced. (AP Photo/David Goldman)

AP Photos: Night fishing in moonlit sea in eerie silence

By DAVID GOLDMAN - Associated Press

Diver Lenford DaCosta tends to lines of staghorn coral growing at an underwater nursery inside the Oracabessa Fish Sanctuary Tuesday, Feb. 12, 2019, in Oracabessa, Jamaica. On the ocean floor, small coral fragments dangle from suspended ropes, like socks hung on a laundry line. DaCosta and other divers tend to these underwater nurseries much as a terrestrial gardener minds a flower bed, plucking off snails and fireworms that feast on immature coral. (AP Photo/David J. Phillip)

AP Photos: Saving Jamaica’s coral, an undersea labor of love

By DAVID PHILLIP - Associated Press

Diver Lenford DaCosta cleans up lines of staghorn coral at an underwater coral nursery inside the Oracabessa Fish Sanctuary on Tuesday, Feb. 12, 2019, in Oracabessa, Jamaica. In Jamaica, more than a dozen grassroots-run coral nurseries and fish sanctuaries have sprung up in the past decade, supported by small grants from foundations, local businesses such as hotels and scuba clinics, and the Jamaican government. (AP Photo/David J. Phillip)

Coral gardeners bring back Jamaica’s reefs, piece by piece

By CHRISTINA LARSON - Associated Press

2 scientists share $500,000 prize for work on cancer biology

Associated Press

This Friday, May 24, 2019 photo shows the &quot;sell by&quot; date for a jug of milk in New York. In May 2019, U.S. regulators are again urging food makers to reduce the variety of terms like &quot;best by&quot; and &quot;use by&quot; that cause confusion about when food should be thrown out. (AP Photo/Bebeto Matthews)

‘Sell By’ or what? US pushes for clarity on expiration dates

By CANDICE CHOI - Associated Press

Spain honors research of plants’ role against climate change

Associated Press

A scientist at the NY Genome Center in New York demonstrates equipment used in single-cell RNA analysis on Wednesday, Sept. 26, 2018. Until recently, trying to study key traits of cells from people and other animals often meant analyzing bulk samples of tissue, producing an average of results from many cell types. But scientists have developed techniques that let them directly study the DNA codes, and its chemical cousin RNA, the activity of genes and other traits of individual cells. (AP Photo/Malcolm Ritter)

New techniques let scientists zero in on individual cells

By MALCOLM RITTER - Associated Press

In this Oct. 10, 2018, photo, scientist He Jiankui speaks during an interview in Shenzhen in southern China's Guandong province. China's government on Thursday, Nov. 29, 2018, ordered a halt to work by a medical team that claimed to have helped make the world's first gene-edited babies. (AP Photo/Mark Schiefelbein)

Could anyone have stopped gene-edited babies experiment?

By MARILYNN MARCHIONE and CHRISTINA LARSON - Associated Press

In this Nov. 28, 2018, photo, He Jiankui, a Chinese researcher, speaks during the Human Genome Editing Conference in Hong Kong. He made his first public comments about his claim to have helped make the world's first gene-edited babies. The uproar over the unproven report of gene-edited births in China has researchers elsewhere worried about a backlash. (AP Photo/Kin Cheung)

Fear that uproar over gene-edited babies could block science

By LAURAN NEERGAARD - Associated Press

In this Oct. 10, 2018 photo, He Jiankui speaks during an interview at a laboratory in Shenzhen in southern China's Guangdong province. Chinese scientist He claims he helped make world's first genetically edited babies: twin girls whose DNA he said he altered. He revealed it Monday, Nov. 26, in Hong Kong to one of the organizers of an international conference on gene editing. (AP Photo/Mark Schiefelbein)

Gene-edited baby claim by Chinese scientist sparks outrage

By MARILYNN MARCHIONE - Associated Press

In this Oct. 9, 2018 photo, Zhou Xiaoqin, left, loads Cas9 protein and PCSK9 sgRNA molecules into a fine glass pipette as Qin Jinzhou watches at a laboratory in Shenzhen in southern China's Guangdong province. Chinese scientist He Jiankui claims he helped make world's first genetically edited babies: twin girls whose DNA he said he altered. He revealed it Monday, Nov. 26, in Hong Kong to one of the organizers of an international conference on gene editing. (AP Photo/Mark Schiefelbein)

Q&A on scientist’s bombshell claim of gene-edited babies

By LAURAN NEERGAARD and MALCOLM RITTER - Associated Press

In this July 12, 2018 photo, Tara Clemenceau, 11, visiting from France, tries her hand at the controls of a Mercury space capsule at the U.S. Space &amp; Rocket Center in Huntsville, Ala. Huntsville's tourism industry is rooted in the U.S. space program and its critical, ongoing research into getting astronauts back to the moon and on to Mars. (AP Photo/Vasha Hunt)

Rocket City, Alabama: Space history and an eye on the future

By MARCIA DUNN - Associated Press

This undated microscope image provided by the American Society for Reproductive Medicine in January 2018 shows a trophectoderm biopsy, in which cells from the outer layer of an embryo that develop into the placenta and amniotic membranes are removed and can be used for genetic testing. When a couple is known to be at risk for having a child with a specific genetic disorder, the woman undergoes a procedure to remove some of her eggs. After fertilization, some cells can be plucked from the embryos and examined to identify those without carry the disease-causing abnormality. (ASRM via AP)Wedn

Parenting of the future: Many embryos, each with DNA profile

By MALCOLM RITTER - Associated Press

Military personnel in College Street Car Park in Salisbury, Sunday March 11, 2018, as police and members of the armed forces probe the suspected nerve agent attack on Russian double agent Sergei Skripal, which took place on Sunday March 4. British health authorities said Sunday that small traces of contamination have been found in a restaurant and a pub in the English city of Salisbury, after a Russian ex-spy and his daughter were poisoned with a nerve agent. (Andrew Matthews/PA via AP)

UK says ex-spy poisoned with Soviet-developed nerve agent

By MARIA CHENG - Associated Press

FILE - In this Tuesday, May 2, 2017 file photo, a sign at the specialty clinic at Children's Minnesota in Minneapolis, alerts patients to a measles outbreak in the area. While parts of the world have all but banished measles, Europe is still getting hit with large outbreaks where some people don’t get vaccinated. (AP Photo/Amy Forliti, file)

Science Says: Why Europe still has so many measles outbreaks

By MARIA CHENG - Associated Press

In this undated photo provided by the Chinese Academy of Sciences, cloned monkeys Zhong Zhong and Hua Hua sit together with a fabric toy. For the first time, researchers have used the cloning method that produced Dolly the sheep to create two healthy monkeys, potentially bringing scientists closer to being able to do that with humans. (Sun Qiang and Poo Muming/Chinese Academy of Sciences via AP)

Scientists successfully clone monkeys; are humans up next?

By MALCOLM RITTER - Associated Press

This image from video provided by the Chinese Academy of Sciences in January 2018 shows cloned monkeys Zhong Zhong and Hua Hua in Shanghai, China. Researchers said the genetically identical long-tailed macaques are the first primate clones made by by the method that produced Dolly the sheep. (Qiang Sun and Mu-ming Poo/Chinese Academy of Sciences via AP)

Scientists successfully clone monkeys; are humans up next?

By MALCOLM RITTER - Associated Press

ADDS SOURCE RUHR UNIVERSITY BOCHUM - In this Oct. 18, 2017, photo provided by Ruhr University, doctors lift up a sheet of skin in a lab at St Josef-Hospital in Bochum, Germany. Doctors treating a critically ill boy with a devastating skin disease used experimental gene therapy to create an entirely new skin for him. Two years ago, the boy was admitted to a German hospital, with blisters all over his body. In an experiment, doctors took a small sample of the boy’s skin and added a normal version of the bad gene to his skin cells. They grew new sheets of skin in the lab and transplanted those onto the boy. Details of the case were published Wednesday, Nov. 8. (Mirko Wache/Ruhr University Bochum via AP)

Boy with rare disease gets brand new skin with gene therapy

By MARIA CHENG - Associated Press

FILE - In this Dec. 1, 2015 file photo, Feng Zhang of the Broad Institute of MIT participates in a panel discussion at the National Academy of Sciences international summit on the safety and ethics of human gene editing, in Washington. Scientists are altering a powerful gene-editing technology in hopes of one day fighting diseases without making permanent changes to people's DNA. (AP Photo/Susan Walsh)

Scientists working toward reversible kind of gene editing

By LAURAN NEERGAARD - Associated Press