[marcosdumay]

> A question that often arises is: if current life evolved from chemistry that's simpler than DNA, why has that one disappeared? Maybe it hasn't.

If that's the case, it was almost certainly because of the atmospheric oxygen.

Almost all of the chemical reactions that used to happen before it do not happen anymore on the wild.

[ace2358]

Having oxygen in the atmosphere and liquid water truly steers the kinds of chemistry we study.