Want to hangout with Robert Ballard, James Cameron, Jane Goodall, and explorers from all seven continents? Join +National Geographic
for a global Hangout on Air this Sunday, January 13, at 1 p.m. ET (6 p.m. UTC).
Learn about the explorers' expeditions at http://natgeo125.appspot.com/
and use #NatGeo125
to ask your questions.