Synthetic yeast allows on-demand evolution

A team of Johns Hopkins researchers has created from scratch a new form of yeast that includes synthetic DNA.

Lager yeast traced to Patagonia

It's not widely known - well, none of us knew, anyway - that the yeast used to make lager beer is a hybrid of real ale yeast and another species that's about as distant from it genetically as a human is from a chicken.

Aerobic life existed 300 million years earlier than thought

Oxygen may have been sustaining life in Earth's oceans long before there was any trace of it in the atmosphere.