Asked by: Jake Bogdan, Switzerland

Advertisement

Our evolutionary ancestors lived with lots of toxic plants and we evolved a gene that makes the toxins in these plants taste bitter to discourage us from eating them. Children probably evolved a stronger aversion to bitter tastes because they haven’t yet learned which plants are dangerous. We learn which plants are safe and lose half of our taste receptors by the time we are 20, making vegetables taste less bitter.

Advertisement

Subscribe to BBC Focus magazine for fascinating new Q&As every month and follow @sciencefocusQA on Twitter for your daily dose of fun science facts.

Authors

luis villazon
Luis VillazonQ&A expert

Luis trained as a zoologist, but now works as a science and technology educator. In his spare time he builds 3D-printed robots, in the hope that he will be spared when the revolution inevitably comes.

Advertisement
Advertisement

Sponsored Deals

BBC Science Focus Magazine Subscription Offer

May Half Price Sale

  • Save up to 52% when you subscribe to BBC Science Focus Magazine.
  • Risk - free offer! Cancel at any time when you subscribe via Direct Debit.
  • FREE UK delivery.
  • Stay up to date with the latest developments in the worlds of science and technology.
SUBSCRIBE NOW
Advertisement