Could there be life on other planets?
Stardust Wakes Up
Could there be life on other planets?
Look up at the night sky. See those tiny dots of light? Each one is a sun, and around many of those suns, planets spin through the dark. Our galaxy alone has hundreds of billions of stars. And this is the wild part: we're pretty sure we're not the only living things out here.
Life on Earth needs three things: liquid water, energy (usually from the Sun), and the right chemicals (carbon, nitrogen, oxygen — the building blocks). Turns out, those ingredients aren't rare. We've found water ice on Mars, geysers shooting from moons around Jupiter and Saturn, and thousands of planets orbiting other stars in what we call the "habitable zone" — the distance from a star where water stays liquid.
