Today we will discuss incredible news that has just been announced by a team of astronomers, perhaps one of the most important discoveries in decades. Possible evidence for life has been announced on another planet Venus.
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For many years scientist theorized that liquid water may be present on mars and later they found small clues pointing towards its existence. Today it is an undeniable fact that water is present on mars and was plentiful in the past. This is how we should imagine the process of finding extra-terrestrial life outside the Earth, where tiny clues build into a humongous mountain of evidence. And a few days ago we made a breakthrough and made a significant discovery. But how could Venus harbour life?  Join us today in this exciting discussion where we discuss the exciting announcement. What an exciting day marked by the announcement of a chemical marker of biology in the atmosphere of Venus. For many years humans have looked for life on mars as their best bet for finding life outside the Earth. NASA has invested a lot more money in sending Landers and Rovers on Mars than Venus.  The soviets on the other hand have sent a lot of missions to Venus and are also the only ones to ever land their probe on the surface of Venus because of the scorching high temperatures on the surface reaching over 500 degrees and a very high pressure similar to a kilometre beneath the ocean. So how could life possibly survive on the surface of Venus when even the Soviet probes hardly survived a couple of hours? 
In 2019. a group of scientists published a paper about how we could possibly detect life on exoplanets using bio signatures and how a chemical called Phosphine is very promising bio signature for life. Biosignature is just a way of saying that a particular chemical indicates life. Oxygen is a classic example and is produced by the process of photosynthesis and I present in our atmosphere. Phosphine as a biosignature is certainly less studied but produced by anaerobic ecosystems. We don’t know about any other process which produces this gas in such large amounts. Therefore, detection of Phosphine in significant amounts on any exoplanet is a powerful indicator that life processes might happen on the planet.In September 2020 a group of astronomers announced a significant observation of phosphine in the clouds of our nearest neighbouring planet Venus. So how could life possibly survive on the surface of Venus when even the Soviet probes hardly survived a couple of hours?  Well, things are har* the surface, but if we head up into the clouds, the pressure drops and the temperature becomes mild. On earth we find microbial life in the clouds, up to 3 million tons of bacteria are lofted up from the ground via air currents and fungal spores and micro-algae. So the idea of life In clouds is perfectly legitimate. And because of the thicker atmosphere of Venus, they remain there. The atmospheric composition of Venus is almost made entirely of carbon dioxide and the clouds are highly acidic composed of Sulphuric acid, where most life that exists on Earth would immediately perish. But not all! We know many microbial organisms to have survive in such extreme conditions by evolving themselves. When the soviets probes reached the hellish like surface of Venus they took photographs of the surface. In one of these missions they seem to have detected particle that was about 1 micron thick, which is equal to the length of a typical bacterium. There is an interesting theory that these bacterial like particle might be covered in a molecule called S8. S8 is a ring like chain of eight sulphur atoms which is impenetrable by sulphuric acid.
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Credits: Ron Miller
Credits: Nasa/Shutterstock/Storyblocks/Elon Musk/SpaceX/Esa
Credits: Flickr

Video Chapters:
00:00 Introduction
01:24 Overview
03:49 Phosphine
06:05 History and Conditions of Venus
08:50 Cloud Samples

#insanecuriosity #lifeonvenus #venus

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