The amount of gold used to make a medal shrunk after each of the two World Wars, according to Olympic medal collector and expert Jim Greensfelder.

CNN: Why Olympians bite their medals

Willem-Alexander is a 45-year-old father of three young daughters, an International Olympic Committee member, a pilot and a water management expert.

NPR: Dutch Queen Beatrix Abdicating, Son Will Be King

Seagrave is recognized as an expert in sprint and power development and coaches several Olympic and world champion track athletes.

FORBES: Track Star Ryan Bailey's Coach Beats IRS In Tax Court

Survival expert Ray Mears won an outdoor adventure badge and there was an athlete badge for teenage Olympic diver Tom Daley.

BBC: Scout's honour for Jamie Oliver