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A new look at nearly 3.7 million-year-old fossil footprints uncovered in Tanzania shows that multiple species of early humans lived together at the same time.

Scientists have found many planets orbiting distant stars, but so far no proof that any have moons. Now, researchers have detected signs of a large exomoon orbiting a Jupiter-like world.

With the James Webb Space Telescope safely deployed, many scientists want to use it. To minimize the effect of unconscious biases, they go through a process developed for the Hubble Space Telescope.

The James Webb Space Telescope blasted off from French Guinea at 7:20 a.m. ET on Saturday, Dec. 25. The NASA mission was decades in the making and should reveal the earliest galaxies in the universe.

A study shows how much prey whales eat. It reveals how the global loss of whales changed ocean life in ways that may make it harder for them to rebound. (Story first aired on ATC on Nov. 11, 2021.)

NASA's James Webb Space Telescope is waiting at its launch site, after years of repeated delays and cost overruns. At one point, the giant new observatory was threatened with cancellation.

As they count down the hours to the highly anticipated launch of NASA's powerful, $10 billion James Webb Space Telescope, astronomers hope for the best while fearing the worst.

The upcoming launch of NASA's powerful James Webb Space Telescope should let astronomers see what some of the universe's first stars and galaxies looked like soon after the Big Bang.

The James Webb Space Telescope will let astronomers peer farther into space than ever before, to see what galaxies looked like when the universe was newly born.

NASA's TESS telescope finds a small, iron-rich planet which could help explain the origins of Mercury, the innermost planet in our solar system

A new look at nearly 3.7 million-year-old fossil footprints uncovered in Tanzania shows that multiple species of early humans lived together at the same time.

NASA is about to launch the first mission of its new planetary defense office. A spacecraft will attempt to knock a small asteroid off course by ramming into it.

NASA should work toward a new space telescope that could view small planets around distant stars with the potential to host life, expert panel says

Scientists have gotten the best estimates yet of exactly how much baleen whales, the largest animals on the planet, can consume in one day. Their caloric intake is mind-boggling.

Scientists who want to understand what's beyond our solar system have designed an interstellar spacecraft that could go out farther and faster than the famous Voyager probes.

New space companies are touting space tourism. But so far the final frontier has been the playground of the rich or famous, plus a few everyday folks who had a bit of luck.

Benjamin List and David MacMillan were awarded the 2021 Nobel Prize in chemistry for coming up with a new tool for constructing molecules that has advanced pharmaceuticals and green technology.

Francis Collins has served longer than any other director of the National Institutes of Health since 1971. He tells NPR he did not anticipate the culture wars taking over scientific fact.

Some scientists say discrimination against gay and lesbian government employees during James Webb's tenure as NASA administrator should preclude him from having a telescope named in his honor.

The James Webb Space Telescope will let scientists study small, rocky planets around distant stars in more detail than ever before. After decades of work, it could head into orbit later this year.