Pterosaur reptile used "pole vault" trick for take-off
15 November 2010 Last updated at 21:55 GMT
A new study claims that the ancient winged reptiles known as pterosaurs used a "pole-vaulting" action to take to the air.
They say the creatures took off using all four of their limbs. This animation shows the different stages of the launch.
Video courtesy of Julia Molnar, Genus Studios.