NASA's Perseverance rover has been busy gathering bits of Mars — rock cores the size of chalk sticks, clusters of broken fragments no bigger than pencil erasers, and even grains of dust fine enough to ...

Samples drilled by the Curiosity rover on Mars have revealed abundant signs of a carbon cycle that remained hidden from orbital scans, alongside clues of how life may have been wiped out on the planet ...

Major depression is one of the most common mental health conditions in the world. It affects millions of people and can cause ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Scientists have ...

Samples of store-bought rice from more than 100 different brands purchased in the United States contained dangerously high levels of arsenic and cadmium, according to a new report shared first with ...

While hydrogen itself doesn’t trap greenhouse gases, its interaction with other gases can indirectly heat the atmosphere 11 ...