UNDRTKR984's channel

The Known Universe takes viewers from the Himalayas through our atmosphere and the inky black of space to the afterglow of the Big Bang. Every star...

From the NASA Swift team, watch full screen 1080p! Most large galaxies contain a giant central black hole. In an active galaxy, matter falling towa...

Ferrofluid is a liquid that reacts to a magnetic field. It's usually made from a mixture of oil and tiny iron particles. Today we're going to look ...

Decided to put this on youtube.