all life on Earth has a common origin?
The chemical elements are the basis of all matter (from rocks, minerals, and ores, to air, water, plants, animals and humans) and are the foundation of all life. For example, the human body is made of following elements:
- Oxygen – 65% (site of origin: supernovae)
- Carbon – 18.5% (site of origin: Red Giants)
- Hydrogen – 9,5% (site of origin: Big Bang)
- Nitrogen – 3,3% (site of origin: Red Giants)
- Calcium – 1,5% (site of origin: supernovae)
- Phosphorus – 1,0% (site of origin: supernovae)
- Iron – 0,006% (site of origin: Super Giants)
By studding meteorites, scientists discovered the origins of these elements in the space – nuclear fusion reaction deep inside a star, like our Sun, produces Hydrogen, whereas Iron is formed at high temperatures and under high pressure by other fusion reactions in the interior of old dying stars, or other elements are formed during supernovae explosions, whose remnants are expanding gas clouds that distribute the elements into space, which provide the raw material for new stars and planets – and for us) – and hence the famous expression: “We all are stardust” !
During the course of Earth’s history, each biologically bound nitrogen atom has been recycled 1.000 times already, while oxygen atoms have gone through 60 cycles so far. Death, decay and decomposition close natural resource cycles. The nutrients taken up during feeding are released again and thus made available to other organisms. The increase and loss of matter is negligible. Each year about 100.000 tons of cosmic dust reach Earth. Conversely, a small amount of atmosphere is lost by erosion through solar wind.
When it comes to living organisms, more proof of same origin and similarities occur:
- all organisms use the same 23 amino acids to form proteins although there are more than 250 potential amino acids
- all amino acids in organisms are left-handed molecules, although right-handed variants exist in nature as well
- all organisms use the bio-molecule DNA as the carrier for genetic information
- the sources of energy for life are charged hydrogen atoms, packed in the energy-storage molecule
This reemphasizes the connectivity between all life on Earth, and similarity between humans and other animal species and plants! For all the external differences, deep down, we’re very much alike!