NASA's Perseverance rover collects Martian soil samples from Jezero Crater, revealing potential signs of past life on Mars.

Why do astronomers look for signs of life on other planets based on how life is on Earth? Couldn’t there be totally different kinds of life on other planets? – Henry, age 13, Somerville ...

Most of us are reserving judgment on whether there is intelligent life on other planets; we haven’t even found bacteria yet, much less a race of aliens with Internet service and takeout food.

There are hundreds of millions of planets around other stars in our Milky Way galaxy ... by scientists as essential in the hunt for life because only planets that are in this zone could ...

Their mission could "change the way we look at the possibility of life on other planets too," the researchers ... "But these [new] experiments will provide the proof." This might seem a niche ...

So scientists are using different methods to see if there is life on planets other than the Earth. Space probes can explore other planets without needing astronauts. Some of the missions ...