A laboratory has been growing 12 populations of E. coli since 1988 — this year, the cultures will get a new custodian. On 24 February 1988, evolutionary biologist Richard Lenski filled 12 flasks with ...

On a physical level, a transistor’s internal functioning is very complex, but, in practice, using it in some simple experiments is quite easy and affordable for everyone. A transistor allows to create ...