Nasa to return largest asteroid sample ever

Experts say the carbon-rich, near-Earth asteroid serves as a time capsule from the earliest history of the solar system.

Samples from the asteroid Bennu are due to return to Earth (Nasa/Goddard/University of Arizona/PA)

Nasa is set to deliver the largest asteroid sample ever returned to Earth.

A capsule containing about 250g of rocks and dust collected from asteroid Bennu is expected to land at 3.55pm BST on Sunday.