Sidewalk construction in Tianjin. Last year thousands of residents were evacuated from apartments in the city after nearby streets split apart.

Siddharth Hariharoan tries to control a toy helicopter with his mind through the MindWave Mobile, a device by NeuroSky that reads brain waves.

A health worker administering a dosage of the cholera vaccine during an immunization campaign in Harare, Zimbabwe, in January.

Nazi doctors and scientists on trial at Nuremberg in 1947 for human experiments, murders and other atrocities during the Holocaust.

Scorching temperatures this month in São Paulo, Brazil.

Landfills are the third-largest source of human-caused methane emissions, according to the Environmental Protection Agency.

Researchers discovered that a sunlike star named HD 7977, found 247 light-years away in the constellation Cassiopeia, could have passed close enough to the sun about 2.8 million years ago to alter the orbits of the Earth and other planets.

“Phosphorus has a special place in my heart,” said Dante Lauretta, who leads the Arizona Astrobiology Center.

We’re still in the Holocene.

Walter Massey outside his home in Chicago’s Hyde Park. “I’m a physicist,” he said. “And I don’t say, ‘I used to be.’”

Ytasha Womack, a screenwriter on “Niyah and the Multiverse,” currently playing at the Adler Planetarium in Chicago, is the author of numerous works including “Black Panther: A Cultural Exploration.”

Smoke rises after Japan’s Space One’s small, solid-fueled Kairos rocket exploded shortly after its inaugural launch at Space One’s launching pad

A yellow-winged bat in Kenya. In nearly half of all bat species, females are larger than males.

Abraham “Avi” Loeb, a Harvard University astrophysicist, displaying a tube containing geological fragments recovered from the bottom of the Pacific Ocean in August 2023.

One of the two proposals for an “extremely large telescope” could involve construction on Mauna Kea in Hawaii.

Bodies that had been donated to science are laid in the sun at Colorado Mesa University’s forensic research station in Whitewater, Colo.

Skipjack tuna in Miyagi Prefecture, Japan, in October. Thousands of tuna samples collected around the world from 1971 to 2022 showed mercury levels almost unchanged.

Dr. Jason Nagata, left, a pediatrician specializing in eating disorders at the University of California, San Francisco; and Dr. Sarah Smith, a child and adolescent psychiatrist at the University of Toronto.

King Charles III waved as he left the London Clinic after receiving treatment for an enlarged prostate last week.

Pastor Steven Tendo was detained by ICE for 26 months, including recurring stints in solitary confinement.

The Australian news station 9News apologized to Georgie Purcell, a member of Victoria’s Parliament, and blamed a Photoshop automation tool for altering an image of her.

A gentoo penguin at the Maldonado base on Greenwich Island, Antarctica, this month.

An artist’s depiction of hydrogen gas observed in the galaxy J0613+52, with the colors indicating the likely rotation of the gas relative to the observer, red indicating motion away, blue indicating motion toward.

Only about 1 percent of rare earth metals in old electronic products are currently reused or recycled, researchers estimate.

A polar bear in Kaktovik, Alaska in 2016.

A composite image showing the quasar UHZ-1. The X-ray data from the Chandra X-ray Observatory is shown in purple; the galaxies and stars are from infrared data from the James Webb Space Telescope.

In July, officials in Finnmark, Norway, collected birds that had died of avian flu.

Nasra Gwoto, 10, and her brother, Ramadhani, 12, traveled with their mother from Tanzania to India to get a bone-marrow transplant for sickle cell disease. The procedure is risky, and their mother wishes they could have received a new gene therapy instead.