Science Times: The First Genetically Edited Babies?

Plus: NASA's Newest Mars Lander to Probe the Red Planet's Deep Secrets —

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A microplate containing embryos whose genes may have been edited by a Chinese scientist. Mark Schiefelbein/Associated Press The First Genetically Edited Babies? By GINA KOLATA, SUI-LEE WEE AND PAM BELLUCK The researcher, He Jiankui, offered no evidence or data to back up his assertions. But if true, some fear the feat could open the door to "designer babies."

NASA NASA's Newest Mars Lander to Probe the Red Planet's Deep Secrets By KENNETH CHANG The InSight spacecraft touched down on Monday. In the months ahead, it will listen for marsquakes and seek clues about how Mars and other rocky planets formed. • How to Land on Mars • Mars Had a Busy Year. Get Caught Up. Jens Mortensen for The New York Times This Is the Way the Paper Crumples By SIOBHAN ROBERTS In a ball of paper, scientists discover a landscape of surprising mathematical order. NASA Goddard MODIS Rapid Response Team Beneath Antarctica's Ice Is a Graveyard of Dead Continents By ROBIN GEORGE ANDREWS Data from a European satellite has revealed the tectonic underworld below the frozen southernmost continent. Paul Caiger/Woods Hole Oceanographic Institution Visitors From the Ocean's Twilight Zone By JOANNA KLEIN Researchers recently hauled up specimens from a layer of the world's seas that contains an abundance of aquatic life.

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Roy R. Funch A Metropolis of 200 Million Termite Mounds Was Hidden in Plain Sight By KENNETH CHANG What amount to garbage piles — some are 4,000 years old — are spread over an area the size of Britain in a remote Brazilian forest. Photo illustrations by Matt Dorfman. Source photographs: Bridgeman Images. The Insect Apocalypse Is Here By BROOKE JARVIS What does it mean for the rest of life on Earth? Cesare Abbate/Pompeii Archaeological Park Leda and the Swan: A Fresco Comes to Life in Pompeii Excavation By ELISABETTA POVOLEDO An expensive excavation campaign to shore up an at-risk area of the city is a constant font of archaeological discoveries. Max Whittaker Poisoned Wildlife and Tainted Meat: Why Hunters Are Moving Away From Lead Bullets By IAN URBINA AND MAX WHITTAKER Many hunters are ditching traditional ammunition amid mounting evidence that it harms scavengers and pollutes the food people eat. Kenneth Catania/Vanderbilt University The Wasp Wants a Zombie. The Cockroach Says 'No' With a Karate Kick. By NICHOLAS ST. FLEUR Scientists documented the fancy footwork that helps some cockroaches fend off a wasp's paralyzing sting. Jacob Biba for The New York Times Real vs. Artificial Christmas Trees: Which Is the Greener Choice? By KAREN ZRAICK Here's a look at the central claims — and the common misconceptions — in that debate.

The Secret to That Bright-Red Drink? Little Bugs By ROBERT SIMONSON More Than 140 Whales Die in New Zealand After Mass Beaching By CHARLOTTE GRAHAM-MCLAY Scott Pruitt's Environmental Rollbacks Stumbled in Court. His Successor Is More Thorough. By LISA FRIEDMAN Q&A Why does a memory come seemingly out of nowhere? By C. CLAIBORNE RAY

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Climate Change Tom Brenner for The New York Times Trump Administration's Strategy on Climate: Try to Bury Its Own Scientific Report By CORAL DAVENPORT Friday's government report, detailing in stark terms the economic cost of climate change, is likely to be played down by the administration, even as opponents use it to attack Trump policies. • U.S. Climate Report Warns of Damaged Environment and Shrinking Economy • What's New in the Latest U.S. Climate Assessment Rebecca Conway for The New York Times The World Needs to Quit Coal. Why Is It So Hard? By SOMINI SENGUPTA Coal, the most polluting of energy sources, shows no sign of disappearing three years after the Paris agreement, when world leaders promised decisive action against global warming. • Ask a Climate Scientist

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Health Maddie McGarvey for The New York Times This City's Overdose Deaths Have Plunged. Can Others Learn From It? By ABBY GOODNOUGH Dayton, Ohio, had one of the highest overdose death rates in the nation in 2017. The city made many changes, and fatal overdoses are down more than 50 percent from last year. Gracia Lam Personal Health Helping Teenagers to Be Safer Drivers By JANE E. BRODY New drivers are more likely to get into trouble because they lack experience, but the best way to reduce the risk of a crash is to become an experienced driver. Illustration by Celia Jacobs Breathing Through the Nose May Offer Unique Brain Benefits By GRETCHEN REYNOLDS Could nasal breathing be more helpful for our brains than breathing through the mouth? Getty Images Regular Exercise May Keep Your Body 30 Years 'Younger' By GRETCHEN REYNOLDS The muscles of older men and women who have exercised for decades are indistinguishable in many ways from those of healthy 25-year-olds. Clarence Tabb Jr./Detroit News, via Associated Press Federal Ban on Female Genital Mutilation Ruled Unconstitutional by Judge By PAM BELLUCK In a Michigan case involving members of a small Muslim sect, the court found that only states, not federal prosecutors, could bring charges. Stephen Savage Social Security Runs Short of Money and Ideas Fly on How to Repair It By PAULA SPAN As Social Security dips into its trust fund, policymakers propose changes to fix the program's finances and strengthen its benefits, especially for women. Jason Henry for The New York Times The Morning After: One Man's Quest for a Hangover Cure By MOLLY YOUNG Shaughnessy Bishop-Stall's "Hungover" is filled with boozy factoids, eccentric remedies and tales of alcoholic adventures on several continents. Pete Gamlen How to Take Charge of Your Medical Care By ELIZABETH YUKO Walking into a doctor's office can be intimidating. Learn how to ask your questions, either for yourself or a loved one, figure out your various medical options and determine the best course of action to maintain or regain your health.

Ask Well Sometimes my doctor orders an M.R.I., sometimes a CAT scan or an ultrasound. If one is best, why not just order it every time? By RICHARD KLASCO, M.D. Only Romaine Lettuce From Central and Northern California Is Unsafe, F.D.A. Says By SHEILA KAPLAN Chickenpox Outbreak at School Linked to Vaccine Exemptions By CHRISTINA CARON Probiotics Do Not Ease Stomach Flu By NICHOLAS BAKALAR

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