SciShow Space is a spin-off channel of SciShow. It focuses entirely on space, as the name would suggest, and it has 3 hosts - Hank Green, Caitlin Hofmeister, and Reid Reimers.
Subscribers: 828,668 (Must always be updated)
Views: 81,051,980 (Must always be updated)
Channel founded: 10th March 2014
Most watched video: The Unexpected Effects of Nukes in Space (May need updating)