Comet 3I/ATLAS, the third known interstellar object ever detected passing through our solar system, carries a chemical signature that does not match what astronomers typically see in comets born ...

What 3I/ATLAS is, in the most practical meaning, is a comet performing comet activities- losing gas and dust as the sun heats an icy nucleus- and it is at the same time doing something really out of ...

For years, scientists thought Saturn’s moon Titan hid a global ocean beneath its frozen surface. A new look at Cassini data now suggests something very different: a thick, slushy interior with pockets ...

The deterioration of the Earth’s ozone layer, which protects the planet from harmful radiation, was viewed as an existential threat to humanity for decades. But today, you rarely hear about it. Ever ...

Trump administration officials say changes to federal agencies engaged in science were made in the interests of better science that benefits more Americans. Many scientists we spoke with disagree.