Science Times: NASA Craft Makes Rendezvous With Most Distant Object Ever Visited

Plus: James Watson Won't Stop Talking About Race —

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S. Alan Stern, center, New Horizons' principal investigator, surrounded by children celebrating the flyby of a distant, icy world. Matt Roth for The New York Times NASA Craft Makes Rendezvous With Most Distant Object Ever Visited By KENNETH CHANG Now, scientists await confirmation that the visit succeeded, and a bounty of new data about a small, mysterious icy body four billion miles from Earth. • A Journey Into the Solar System's Outer Reaches, Seeking New Worlds to Explore • Sync your calendar with the solar system

David Plunkert Memorial Sloan Kettering's Season of Turmoil By KATIE THOMAS AND CHARLES ORNSTEIN One of the nation's top cancer hospitals has grappled with how to bring breakthrough treatments to market while remaining true to its mission. Mark Mannucci/Room 608 Inc. James Watson Won't Stop Talking About Race By AMY HARMON The Nobel-winning biologist has drawn global criticism with unfounded pronouncements on genetics, race and intelligence. He still thinks he's right, a new documentary finds. Ahn Young-joon/Associated Press One Giant Step for a Chess-Playing Machine By STEVEN STROGATZ The stunning success of AlphaZero, a deep-learning algorithm, heralds a new age of insight — one that, for humans, may not last long. Gracia Lam Personal Health Hearing Loss Threatens Mind, Life and Limb By JANE E. BRODY Poor hearing is not just an annoying inconvenience.

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Cesare Abbate/EPA, via Shutterstock Ancient Purebred Horse With Bronze-Plated Saddle Is Discovered in Pompeii By PALKO KARASZ The horse is the latest treasure unearthed from the city buried by pumice and ash after the eruption of Mount Vesuvius in A.D. 79. Jeenah Moon/Bloomberg How an Explosion (Not Aliens) Turned New York's Night Sky an Electric Blue By MICHAEL GOLD The Men in Black and the Ghostbusters did not respond to requests for comment. USDA Agricultural Research Service A Book That Will Make You Terrified of Your Own House By ROBIN MARANTZ HENIG Rob Dunn's "Never Home Alone" catalogs the world of microbial beings that share our living space and inhabit our showerheads and pillowcases. Diptendu Dutta/Agence France-Presse — Getty Images A Rising Threat to Wildlife: Electrocution By RACHEL NUWER Power lines and electrified fences are killing birds, monkeys, pangolins and even elephants in surprising numbers. Michael Paulsen/Houston Chronicle, via Associated Press How to Recycle Your Christmas Tree By STEPH YIN You don't want your tree to end up in a landfill. Let it have a second life as compost, a barrier for erosion or food for goats. Craig Bailey/Florida Today, via Associated Press Rocket Launches, Trips to the Moon and More Space and Astronomy Events in 2019 By MICHAEL ROSTON A busy year in space just ended, and this one will be full of new highlights in orbit and beyond. • Meteor Showers That Will Light Up Night Skies in 2019

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Health Esther Aarts New Office Hours Aim for Well Rested, More Productive Workers By EMILY LABER-WARREN A growing number of businesses are encouraging their employees to work when their bodies are most awake. Jeenah Moon for The New York Times Year in Fitness: How Exercise Keeps Us Young By GRETCHEN REYNOLDS Scientists are only now beginning to understand the many microscopic changes that occur when we exercise. Ilana Panich-Linsman for The New York Times In Rehab, 'Two Warring Factions': Abstinence vs. Medication By ABBY GOODNOUGH A reluctant evolution is taking place in residential drug treatment for opioid addiction. Here's a look at one center's wary shift. George Etheredge for The New York Times Congratulations on the Promotion. But Did Science Get a Demotion? By AARON E. CARROLL The incentives of grant funding and career advancement, even the potential for fame, can influence researchers.

Ask Well What foods are banned in Europe that are not banned in the United States, and what are the implications of eating those foods? By RONI CARYN RABIN Moderate Drinking May Benefit Heart Failure Patients By NICHOLAS BAKALAR In Screening for Suicide Risk, Facebook Takes On Tricky Public Health Role By NATASHA SINGER 4 Ways to Be Happier in 2019 By THE NEW YORK TIMES

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