Pterodactyl tail vanes functioned like ship sails, says latest research
The vanes on early pterosaur tails were supported by criss-crossing fibers and tube-like structures, providing stability and ...
BBC3 年
The beginning of flight
that of the aeroplane SINGLE LEAF KITE A simple leaf kite popular in Bali and surrounding countries - flown with a long tail. It is thought that leaf kites were the first ever to be flown This ...