THE search for alien life across our Solar System and beyond has so far kicked up nothing intelligent – let alone microbial.
But researchers now believe extraterrestrials could be lurking deep in the oceans on other worlds – like Saturn’s icy moon, Enceladus.
Alien oceanlife could be having a party on the seabed – and us humans would have no clue[/caption]
Ames and his team found that Enceladus’s ocean could behave like oil and water in a jar, with layers that resist vertical mixing[/caption]
The physics of alien oceans, which is different to that of Earth’s waters, could stop evidence of deep-sea life from reaching places where scientists can detect it, according to a new study.
Enceladus’s ocean forms distinct layers that slow the movement of material from the ocean floor to the surface, the study published today in Communications Earth and Environment revealed.
So alien oceanlife could be having a party on the seabed – and us humans would have no clue.
Telltale signs of life – like chemical traces, microbes and even organic material – could become unrecognisable by the time they reach the surface, the study said.
“Imagine trying to detect life at the depths of Earth’s oceans by only sampling water from the surface, ” said Flynn Ames, an expert on icy moons at the University of Reading, and lead author of the study.
“That’s the challenge we face with Enceladus, except we’re also dealing with an ocean whose physics we do not fully understand.”
Ames and his team found that Enceladus’s ocean could behave like oil and water in a jar, with layers that resist vertical mixing.
“These natural barriers could trap particles and chemical traces of life in the depths below for hundreds to hundreds of thousands of years,” explained Ames.
“Previously, it was thought that these things could make their way efficiently to the ocean top within several months.
“As the search for life continues, future space missions will need to be extra careful when sampling Enceladus’s surface waters.”
Nasa’a EELS (Exobiology Extant Life Surveyor) project aims to put a robotic-snake on Enceladus to search for life.
The tool, being developed in Nasa’s Jet Propulsion Laboratory (JPL) at CalTech, is set to explore vent systems on the small icy moon of Saturn called Enceladus.
Scientists believe these vents could be housing microbial life – such as bacteria, algae, protozoa or even fungi.
All you need to know about planets in our solar system
Our solar system is made up of nine planets with Earth the third closest to the Sun. But each planet has its own quirks, so find out more about them all…
- How old is Earth? Plus other facts on our planet
- How many moons does Mercury have?
- What colour is Venus?
- How far away is Mars to Earth? And other facts on the red planet
- How big is Jupiter?
- How many moons does Saturn have?
- Does Uranus have rings?
- How many moons does Neptune have?
- How big is Pluto?
- How hot is the Sun?
