Science Times: Space Is Very Big. Some of Its New Explorers Will Be Tiny.

Plus: Karen Uhlenbeck Is First Woman to Receive Abel Prize in Mathematics —

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A replica of the MarCO cubesats at NASA's Jet Propulsion Laboratory in Pasadena, Calif. Rozette Rago for The New York Times Space Is Very Big. Some of Its New Explorers Will Be Tiny. By SHANNON STIRONE The success of NASA's MarCO mission means that so-called cubesats likely will travel to distant reaches of our solar system.

Andrea Morales for The New York Times Trump Plans to End the AIDS Epidemic. In Places Like Mississippi, Obstacles Are Everywhere. By DONALD G. MCNEIL JR. The administration will focus on more than 50 "hot spots" in the U.S. that annually account for half of new H.I.V. infections. A clinic in the Deep South sees the challenges every day. Andrea Kane/Institute for Advanced Study Karen Uhlenbeck Is First Woman to Receive Abel Prize in Mathematics By KENNETH CHANG Dr. Uhlenbeck helped pioneer geometric analysis, developing techniques now commonly used by many mathematicians. Fatemeh Bahrami/Anadolu Agency, via Getty Images Did Dietary Changes Bring Us 'F' Words? Study Tackles Complexities of Language's Origins By JOANNA KLEIN Softer foods from agricultural lifestyles may have changed the human bite, making it easier to form certain sounds. Julio Manuel Vidal Encinas A History of the Iberian Peninsula, as Told by Its Skeletons By CARL ZIMMER With an analysis of DNA from nearly 300 fossilized remains, scientists are peering into human prehistory in the region.

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Project Apollo Archive/NASA Sealed Cache of Moon Rocks to Be Opened by NASA By SHANNON HALL A half-century ago, three containers of lunar samples were set aside, to await study by more advanced technology. Their time has come. Jay Hare/Dothan Eagle, via Associated Press DNA and a Coincidence Lead to Arrest in 1999 Double Murder in Alabama By HEATHER MURPHY For 19 years, police were unable to identify the person who fatally shot two 17-year-olds. Then they turned to the technique used in the Golden State Killer case. • A Dead Baby Was Found in a Ditch in 1981. DNA Helped Charge the Mother With Murder. J.Common Honey as a Pollution Detector? It's a Sweet Idea By VERONIQUE GREENWOOD Beehives and their contents are a sensitive detector of lead emissions, a study of Canadian urban apiaries showed. NASA How Ultima Thule Is Like a Sticky, Pull-Apart Pastry By KENNETH CHANG Scientists from the New Horizons mission presented their latest findings about the small distant object visited by the NASA spacecraft at the start of the year.

A NASA Journey to the Moon May Need to Find Another Rocket or Two By KENNETH CHANG Mass Migration of Painted Lady Butterflies Entrances Californians By JULIA JACOBS Dead Whale Found With 88 Pounds of Plastic Inside Body in the Philippines By DANIEL VICTOR E.P.A., Scaling Back Proposed Ban, Plans Limits on Deadly Chemical in Paint Strippers By LISA FRIEDMAN Trump Administration Loosens Sage Grouse Protections, Benefiting Oil Companies By CORAL DAVENPORT Q&A Are dung beetles ever employed as a natural way to handle animal feces? By C. CLAIBORNE RAY

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

Climate Change Ting Shen for The New York Times Pictures From Youth Climate Strikes Around the World By THE NEW YORK TIMES Children and young adults around the world skipped school en masse Friday to demand action on climate change. James Whitlow Delano for The New York Times Japan's Enchanting Ice Monsters, Claimed by Climate Change By MOTOKO RICH The Japanese call them "juhyo," or ice monsters, and armies of these abominable snowmen once spread across the country's northern mountains. But they are at risk because of warming temperatures.

Health Gracia Lam Personal Health When the Benefits of Statins Outweigh the Risks By JANE E. BRODY Knowing the odds of side effects and making sure to get periodic checkups that would pick up an adverse reaction, I chose to focus on the drugs' potential benefits. How Big Tobacco Hooked Children on Sugary Drinks By ANDREW JACOBS Researchers combing through archives discovered that cigarette makers had applied their marketing wizardry to sweetened beverages and turned generations of children into loyal customers. Jean-Paul Chassenet/Science Source Tens of Thousands of Heart Patients May Not Need Open-Heart Surgery By GINA KOLATA Replacement of the aortic valve with a minimally invasive procedure called TAVR proved effective in younger, healthier patients. Picower Institute for Learning and Memory, M.I.T. A Possible Alzheimer's Treatment With Clicks and Flashes? It Worked on Mice By PAM BELLUCK Researchers hope the techniques can be applied to help people with Alzheimer's. Jeenah Moon for The New York Times Exercise vs. Drugs to Treat High Blood Pressure and Reduce Fat By GRETCHEN REYNOLDS Exercise can lower blood pressure and reduce visceral body fat at least as effectively as many common prescription drugs, two new reviews report. Jeanine B. Hartnett/U.S. Food and Drug Administration Tobacco and E-Cigarette Lobbyists Circle as F.D.A. Chief Exits By SHEILA KAPLAN AND MATT RICHTEL Juul and Big Tobacco have lobbied for months to protect themselves from aspects of the F.D.A.'s crackdown. As Scott Gottlieb leaves, they see an opening. • National Cancer Chief, Ned Sharpless, Named F.D.A.'s Acting Commissioner

Barbara Low, Whose Research Identified the Shape of Penicillin, Dies at 98 By SAM ROBERTS New Generic Blood Pressure Drug Is Approved to Relieve Shortages By DENISE GRADY Older Americans Are Awash in Antibiotics By PAULA SPAN Talking to Children About Terminal Illness By PERRI KLASS, M.D.

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