From looking into the depths of the earth’s core, to exploring the most distant points of our atmosphere, researchers at Columbia’s Lamont-Doherty Earth Observatory do some pretty neat stuff on a daily basis. And every year they open their doors to us common folk to have a look around! The day features fun programming for kids and adults alike. Or maybe its just fun for the kid in all of us. Either way, it is this Saturday, October 1st, from 10AM-4PM.