Searching for life in alien oceans may be more difficult than scientists previously thought, even when we can sample these extraterrestrial waters directly. A new study focusing on Enceladus, a

Searching for life in alien oceans may be more difficult than scientists previously thought, even when we can sample these extraterrestrial waters directly.

Scientists studying Saturn's icy moon, Enceladus, have discovered that its ocean forms layers that slow the upward movement of life’s chemical signatures. If microbial life exists in Enceladus’ deep sea,

The results show that the most detectable signals from Earth are radio waves, particularly from planetary radar emissions, like those from the former Arecibo Observatory. These signals could potentially be detected from as far as 12,000 light-years away.

Alien lifeforms living in oceans on other planets could remain hidden from spacecraft, suggests new research.