Video · Hydras: Our Immortal, Tentacled Friends TwitterShare on Facebook3K 324 350 views SciShow - December 11, 2015 Science SciShow More Videos How to Make a Warning Last 10,000 Years Science · 10 hours ago The Sahara Used To Be Green. Science · 1 day ago The Sahara Used To Be Green. Science · 1 day ago The Asteroids Big Enough to Wipe Out All Life Science · 2 days ago The Asteroids Big Enough to Wipe Out All Life Science · 2 days ago Why More Young People Are Getting Colon Cancer Science · 3 days ago Using Microbes to Mine the Moon Science · 4 days ago How Crocodilians Just Keep on Surviving Science · 1 week ago