Receive $80 Grab vouchers valid for use on all Grab services except GrabHitch and GrabShuttle when you subscribe to BT All-Digital at only $0.99*/month.
Find out more at btsub.sg/promo
IN A famous lab trial, a chimp named Sultan put two interlocking sticks together and pulled down an elusive prize, a bunch of bananas hanging just out of arm's reach.
Nearly a century later, eager tourists have conducted their own version of the experiment. Equipped with