Science Times: Your Environment Is Cleaner. Your Immune System Has Never Been So Unprepared.

Plus: A Board Game About Birds, Russian Rockets and Robotic Cancer Surgery —

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Mike McQuade Your Environment Is Cleaner. Your Immune System Has Never Been So Unprepared. By MATT RICHTEL A century ago, British scientists suggested a link between increased hygiene and allergic conditions — the first hint that our immune systems are becoming improperly "trained."

Lexey Swall for The New York Times She Invented a Board Game With Scientific Integrity. It's Taking Off. By SIOBHAN ROBERTS How Elizabeth Hargrave turned a passion for ornithology and spreadsheets into a popular game about birds. NASA Goddard Cut the Science Budget? Not So Fast By DENNIS OVERBYE Contrary to first impressions, Congress has done a decent job standing up for scientific research. • NASA Prioritizes Moon Landings Under Trump Budget Proposal Maxim Babenko From Russia, With Thrusters By MAXIM BABENKO AND STEVE BELL As another Soyuz space rocket prepares to send a new batch of astronauts to the International Space Station, a photographer takes us inside the world's oldest and largest spaceport. Pascal Goetgheluck/Science Source Cancer Patients Are Getting Robotic Surgery. There's No Evidence It's Better. By RONI CARYN RABIN High-tech surgical robots aren't an improvement over traditional operations, the F.D.A. warns. For some patients, the robots may be worse.

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National Institutes of Health Another Obstacle for Women in Science: Men Get More Federal Grant Money By ANDREW JACOBS A study finds that female scientists who win grants from the National Institutes of Health get $41,000 less than men. Devin Yalkin Building a Blockbuster: Behind the Scenes With T. Rex By DEVIN YALKIN, JOHN SCHWARTZ AND ALANA CELII Fiberglass, resin, glue, feathers and new technology bring the dinosaur to life at the Museum of Natural History. • T. Rex Like You Haven't Seen Him: With Feathers Charles El Mir/Johns Hopkins University If We Blow Up an Asteroid, It Might Put Itself Back Together By ROBIN GEORGE ANDREWS Despite what Hollywood tells us, stopping an asteroid from creating an extinction-level event by blowing it up may not work. Jean-Pierre Sylvestre Watch Video of Type D Killer Whales, Rarely Seen by Humans By KAREN WEINTRAUB Scientists have collected skin samples from the unusual orcas, which could help determine whether they are a distinct cetacean species. Karla Ortega/Mexico's National Institute of Anthropology 'The Place Is Extraordinary': Well-Preserved Artifacts Are Found Under Maya Ruins By KAREN ZRAICK In a cave under the ancient city of Chichén Itzá, Mexican archaeologists discovered a trove of ceramic artifacts that appear to be over 1,000 years old. Jeff Rotman/The Image Bank, via Getty Squid Share a Colorful Trick With Peacocks By VERONIQUE GREENWOOD With its skin using multiple strategies, the cephalopod becomes a chameleon of the ocean.

Massacre of Children in Peru Might Have Been a Sacrifice to Stop Bad Weather By NICHOLAS ST. FLEUR Gray Wolves May Lose Endangered Status and Protections By JIM ROBBINS How the Internet Travels Across Oceans By ADAM SATARIANO, KARL RUSSELL, TROY GRIGGS, BLACKI MIGLIOZZI AND CHANG W. LEE Q&A How cold is space? By C. CLAIBORNE RAY

SAY HI AND TELL US WHAT YOU THINK We welcome comments and suggestions at sciencenewsletter@nytimes.com.

Climate Change Photo Illustration by The New York Times No One Is Taking Your Hamburgers. But Would It Even Be a Good Idea? By KENDRA PIERRE-LOUIS No, the Green New Deal doesn't ban beef. And while cutting back on burgers can help your own health and the planet's, getting rid of cows entirely is another question. America's Light Bulb Revolution By NADJA POPOVICH Light bulbs are helping to reshape America's energy economy right now. But the Trump administration could slow the pace of the transformation.

Health Scott Camazine/Science Source We Broke the Same Bone. My Recovery Was a Breeze, Hers an Ordeal. Why? By GINA KOLATA Fractures of the fifth metatarsal, in the foot, are common. But doctors treat them in a variety of ways. Mujahid Safodien/Agence France-Presse — Getty Images Bit by Bit, Scientists Gain Ground on AIDS By DONALD G. MCNEIL JR. The "London patient," apparently cured of H.I.V. infection, has gotten all the attention. But other recently revealed advances are more likely to affect the immediate course of the AIDS epidemic. How Artificial Intelligence Could Transform Medicine By ANAHAD O'CONNOR In "Deep Medicine," Dr. Eric Topol looks at the ways that A.I. could improve health care, and where it might stumble. Gracia Lam Personal Health Colon Cancer Screening Can Save Your Life By JANE E. BRODY With colorectal cancer being found in an increasing number of younger adults, the pressure is on to screen millions more. Goran Tomasevic/Reuters The Battle Against One of the Worst Ebola Epidemics Ever Is in Trouble By DENISE GRADY Distrust, fear and lack of communication from aid groups have alienated communities in the Democratic Republic of Congo, leading some people to spurn treatment and even attack treatment centers. University of New South Wales Congratulations, It's Twins. The Doctor Is Perplexed. By HEATHER MURPHY It seems like it should not be possible, but a recent case showed that sometimes a boy and a girl are born as semi-identical twins.

Ask Well Does grapefruit juice affect levothyroxine effectiveness? By RONI CARYN RABIN An Unvaccinated Boy Got Tetanus. His Oregon Hospital Stay: 57 Days and $800,000. By SARAH MERVOSH Using an Asthma Inhaler Correctly By PERRI KLASS, M.D. Doctors Welcome New Depression Drug, Cautiously By BENEDICT CAREY Facebook Announces Plan to Curb Vaccine Misinformation By CHRISTINA CARON Deaths From Drugs and Suicide Reach a Record in the U.S. By ADEEL HASSAN

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