Neil deGrasse Tyson takes us inside NASA’s undersea mission to save Earth from an asteroid, all the more reason why space exploration needs all the support it can get but is hardly getting.

Terrestrial science, even that that is underwater, is an essential precursor to extraterrestrial science. A really interesting look at how we are perfecting techniques to visit an asteroid by living underwater. This project is the last of its kind. Don’t let it perish.