Are aliens hiding in plain sight?

7 September 2020
830 Views

In July, three unmanned missions blasted off to Mars – from China (Tianwen-1), the US (Nasa’s Mars 2020 Perseverance Rover) and the United Arab Emirates (Hope). The Chinese and American missions have lander craft that will seek signs of current or past life on Mars. Nasa is also planning to send its Europa Clipper probe to survey Jupiter’s moon Europa, and the robotic lander Dragonfly to Saturn’s moon Titan. Both moons are widely thought to be promising hunting grounds for life in our solar system – as are the underground oceans of Saturn’s icy moon Enceladus.

Meanwhile, we can now glimpse the chemical makeup of atmospheres of planets that orbit other stars (exoplanets), of which more than 4,000 are now known. Some hope these studies might disclose possible signatures of life.

But can any of these searches do their job properly unless we have a clear idea of what “life” is? Nasa’s unofficial working definition is “a self-sustaining chemical system capable of Darwinian evolution”. “Nasa needs a definition of life so it knows how to build detectors and what kinds of instruments to use on its missions,” says zoologist Arik Kershenbaum of the University of Cambridge. But not everyone thinks it is using the right one.

research centre in California sees a cautionary tale in AA Milne’s story from Winnie-the-Pooh, in which Pooh and Piglet hunt a Woozle without knowing what it looks like and mistake their own footprints for its tracks. “You can’t hunt for something if you have no idea what it is,” she says.

Source: The Guardian

You may be interested

The National Interest: Why is Cyprus still divided? – Analysis
DEFENCE
shares80 views
DEFENCE
shares80 views

The National Interest: Why is Cyprus still divided? – Analysis

Panos - Apr 19, 2021

The division of Cyprus is fast approaching the half-century mark. In fact, that division has now lasted longer than that…

Research suggests ancient Greeks might have sailed to Canada
GREECE
shares18 views
GREECE
shares18 views

Research suggests ancient Greeks might have sailed to Canada

Panos - Apr 19, 2021

The ancient Greeks could have reached Canada in 56 AD – almost a millennium before the Vikings. This is according…

Condition in eastern Mediterranean dominated Dendias, Shoukry meeting in Cairo
GREECE
shares104 views
GREECE
shares104 views

Condition in eastern Mediterranean dominated Dendias, Shoukry meeting in Cairo

Panos - Apr 19, 2021

Greek Foreign Minister Nikos Dendias was cordially welcomed by Egyptian Foreign Minister Sameh Shoukry earlier on Sunday in Cairo. The…

Leave a Comment

Your email address will not be published.