NYT Science

Stardust Solutions says its tiny spheres can reflect the sun’s rays without harming people or the environment. Critics say private companies have no business altering Earth’s atmosphere.

It’s a nightmare faced by families all around Los Angeles: After wildfire smoke blanketed homes, schools and offices with toxic chemicals, when is it OK to go back?

The attack, at a remote uranium mining site in northern Saskatchewan, was only the fourth fatal black bear encounter in the province’s recorded history, officials said.

As the leader of the C.D.C.’s influenza division, she battled to keep up with an ever-changing viral opponent, building a global network of researchers and forecasters.

In a letter to President Trump, the spokesman, Rich Danker, said allowing the sale of flavored e-cigarettes would enhance their appeal to children.

In a dispute over vapes, the president sided with tobacco companies that filled his groups’ coffers over his own F.D.A. commissioner, who resigned in protest.

The creation, care and keeping of creatures is a responsibility the last full-time museum taxidermist in the U.S. takes both seriously and joyfully.

In her second pop-science book, theoretical cosmologist Chanda Prescod-Weinstein returns to her celestial and cultural roots.

The agency’s top food official will step in to the role after Dr. Makary privately said he opposed the administration decision to approve flavored vapes.

On nighttime excursions in dark-sky hot spots like Norway, New Zealand and Nevada, all you have to do is relax and look up. The stars will do the rest.

Lithuanian officials hope restored peat bogs can reinforce the border in addition to locking away planet-warming carbon.

The new strategy also holds promise for lung and colon tumors. Here’s how scientists discovered it.

When researchers used GPS devices to monitor the nests of Hawaiian honeycreepers, they found dozens of cases of brazen avian burglary.

President Trump chose Cameron Hamilton to direct federal disaster response. As acting head of FEMA last year, he had opposed abolishing the agency and was ousted.

Health Secretary Robert F. Kennedy Jr. has toned down his public criticism of vaccines, under orders from the White House. But inside his department, a sprawling research effort is a top priority.

A study of a few patients, to be presented this week, showed promise for a type of therapy that has already cured some blood cancers.

Dr. Makary has been a supporter of the Make American Healthy Again Movement but made some enemies in the administration over vaping, the abortion pill and rejections of new drugs.

The remora often latches on to the exteriors of larger marine creatures. But sometimes it travels in a more intrusive spot: inside a manta ray’s backside.

The slowed pace of grants by the National Science Foundation, under attack from the White House, could put the United States at a disadvantage with China, the scientists warned.

Though illicit e-cigarettes have flooded in from China, the new policy could allow major tobacco companies to sell from prime shelf space at thousands of stores.