since we're way out in the way beyond, a fox urgent now. a total solar eclipse is about to block out the sun and turn day into night. the front row seats are in south american. the u.s. is going to miss out this time around. nasa and others are live streaming it online. here's another look from an observatory in chile. i want to bring in the physicist and author of "the new york times" best seller "the future of humanity", this is the beginning. you can see it there? the crease there? it's the beginning. it will black out as it goes on. we have the author here about the future of space exploration. nobody knows more about this than you do. how long do we believe it will last once it really kicks in?