Why do Olympians bite into gold medals?

Biting medals is a press-pleasing tradition. It is thought to be inspired by the US Gold Rush when miners needed to check nuggets for soft gold as opposed to fool’s gold.

Weighing between 500g and 800g, gold medals are actually made from silver coated with at least 6g of pure gold. A ‘gold’ medal’s value depends on global markets, but those issued in Rio in 2016 were estimated to be worth over £360 each.

Medals for the delayed 2020 Tokyo Olympics are made from recycled metals. The host country’s mint is responsible for making medals, following International Olympic Committee specifications. Solid gold medals haven’t been handed out since 1912.

Read more about athletic science: 

• How do horses get to the Olympics?
• Animal Olympics: 9 species that could smash human world records
• Is there a physical limit to how much food you can eat in one sitting?
• The unique bond between a Paralympian and their guide

from... sciencefocus.com