Starvation can have devastating effects that unfold over multiple generations as a process of adaptation.
The discovery of a strange virus living in a hot, acidic lake may hold the answer to the evolution of DNA as today's most common genetic molecule.
According to another theory, life on Earth may not have begun with RNA but rather with amino acids able to fold into proteins in a high salt environment.
How do antibodies work to fight off diseases like AIDS?
What are antiretrovial drugs and how do they help people with HIV?