From cotton fields to high street racks, fashion bids to be 100% sustainable

Conservation charity WWF and online brand AwayToMars aim to make desirable clothes that have zero impact on the environment

Tesla charges ahead to overtake Ford in market value

Elon Musk’s electric car company has been valued at $49bn, leaving the 100-year-old motor manufacturer lagging behind

55-carat Indian gem once used as a child’s toy could fetch £80,000

Ruby-red spinel with 400-year-old engravings, reportedly discovered near Leicestershire railway track, to go on sale

Selfie as art at the Saatchi: from Rembrandt to a grinning macaque

Exhibition explores the history of the selfie and our changing relationship with this most everyday of art forms