According to what we've learnt : we can approximate the number of generations since the first human pretty much like us (depending what / who we talk about). we have an idea of the series of life ...
What is the most complex biological organism (or precursors) that we have been able to synthesize from raw materials?
In the Miller–Urey experiment they produced several amino acids. I'm not sure if there were other similar experiments that got further. ...
What is the very first abiogenetic piece of reproducing life (small piece of RNA + ribosome that randomly occurred?) hypothesized to have used as an energy source? I'd be interested in sources to what ...