The worlds youngest teacher is zero.
The youngest ever was 5 and the oldest was 90.
Wayne roony (oldest) youngest ( cristiano ronalfo)
Possibly Mark Zuckerburg
The world's youngest biome is the Tundra from what i heard hope this helped at least a little :/
The worlds youngest island is Surtsey, one of the islands in Iceland. After a volcanic eruption in 1963. after the eruption subsided in 1967, erosion had caused it to become smaller in size.
adity mumthakar
macualy brown
king Justin
deepak dubey(sifuji)is the worlds best commando trainer, Shifuji worlds youngest Inventor of His own Martial Arts Fusion version ** Worlds Best Commando Trainer 2008-09-10(Google rating).
The youngest couple to get married were 9 year old Jayla and 7 year old Jose. http://www.citehr.com/209358-worlds-youngest-couple.html here is a link of their story.
The youngest father on record is said to have been only 13 years old. This occurred in 1912 in the UK.