4 ms·
Since heavier elements are made by stars, could we have been much earlier? How much earlier?
by jodrellblank 6y ago
Since heavier elements are made by stars, could we have been much earlier? How much earlier?
- jackcosgrove 6y agoNo one really knows how probable abiogenesis is. The fact that we are complex, sentient life forms within 13.8 billion years of the beginning of the universe seems improbable, especially considering that life on earth spent 2.5 billion years of its 4 billion year history as single-cell organisms. However the complexity of life appears to be accelerating. The earth is only 4.5 billion years old, so it only took 500 million years for life to form on earth, even less when you consider that the cooling of the crust was necessary.
- andi999 6y agoGood question. I remember that somehow we hafäd to go through at least 3 star creation/destruction cycles to get all our elements
- Tepix 6y agoLarge stars have a short lifespan