Asteroid belt’s icy fringe explained

‘Primordial objects’ may have been captured during planetary realignment.

Sequencing unlocks secrets of blood parasites

Possible drug targets revealed in flatworms that cause schistosomiasis.

NIH nominee draws scrutiny

Francis Collins is likely to face funding challenges — and criticism of his Christian evangelism.

Medical isotope shortage reaches crisis level

Robust solutions sought urgently to shore up fragile supply chain.

How brain training makes multitasking easier

Practice speeds up the part of the brain that lets us tackle many jobs at once.