In mice, two treatments — environmental enrichment and a chemical that regulates gene expression — boost new memory formation and restore the recall of old memories that seemed to have been lost.

Molecular studies of tunicate development show that genetic programmes for early embryonic patterning can change radically during evolution, without completely disrupting the basic chordate body plan.

A distant planet traversing its orbit shows variations in its infrared brightness, providing the first map of its climate. These variations paint a picture of a dynamic world, with efficient redistribution of stellar heat.