When it comes to the search for life elsewhere in the universe, methane and other chemical compounds are seen as signs of biology because they are often produced by living microbes. However, ...

According to Sagan, creatures on Jupiter would be incentivized to grow larger than any in Earth's history. The larger they ...

Saturn's icy moon Enceladus would theoretically be able to host some forms of microbial life, according to a scientific study ...

Jupiter's moon Europa has long been studied as one of our best bets for finding life beyond our planet. This is largely because of the vast ocean scientists believe is hiding under its icy shell. But ...

Two major alien-life announcements in 2025 generated enormous excitement, but most astrobiologists remained unconvinced. Only 6.6% of surveyed experts thought possible biological molecules on K2-18b ...

A newly discovered multi-celled extremophile, dubbed the 'fire amoeba,' thrives in Lassen Volcanic National Park's heated ...

Exoplanets are planets that orbit stars other than the sun and thus exist outside the solar system. The word "exoplanet" derives from the term "extrasolar planet," which hints at its existence beyond ...

Scientists are calling for a lunar quarantine facility where samples from Mars, the Moon, and beyond would be examined before being brought to Earth. They warn that even a tiny alien microorganism ...