iron
800g
427,162 and counting
Initial javelins were made of wood until the mid-1950's. Dick Held improved javelin aerodynamics and durability by introducing aluminum javelins around that time (his brother, Bud, was the world-record holder for a time). Current javelins are made of steel, aluminum and/or carbon fiber.
wood and iron
Javelins believe it or not, are members of the rodent family.
no
It is made from carbon fibre because it is lighter so it will stay in the air for longer
javelins
No
Hercules made the Olympics up.
<http://www.javeland.com/> is a reliable site for high quality javelins of various weights and makes.