Welcome back. well, we take a look at the science of survival now, survival that is in the event of a plane crash. >> yeah, more people than you might expect actually make it out of one alive, and experts are now working on improving your odds even more as abc's jim avila reports. >> reporter: an astounding 76% of passengers aboard serious airplane crashes somehow survive. even fireballs like this 1989 dc-10 crash in sioux city, iowa. more than half on board somehow alive or this ethiopian airliner ditched into the sea. still, 54 people lived to tell, and in crash after crash, a denver fiery t...