Researchers have been studying a promising option for male birth control, and we've learned a bit more about how regeneration works in hydras! Holy F****** Science Podcast: www.youtube.com/channel/UCB8EwbFEUR8IrDjq8LA8YrA Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Scott Satovsky Jr, Will and Sonja Marple, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Looking for SciShow elsewhere on the internet? Facebook: www.facebook.com/scishow Twitter: www.twitter.com/scishow Tumblr: scishow.tumblr.com Instagram: instagram.com/thescishow ---------- Sources: Vasalgel www.eurekalert.org/emb_releases/2017-02/bc-mcg020217.php bacandrology.biomedcentral.com/articles/10.1186/s12610-016-0033-8 bacandrology.biomedcentral.com/articles/10.1186/s12610-017-0048-9 www.sciencedirect.com/science/article/pii/S0010782498001036 www.parsemusfoundation.org/projects/vasalgel/vasalgel-faqs/ Hydra www.eurekalert.org/emb_releases/2017-02/cp-hhk020217.php www.cell.com/cell-reports/fulltext/S2211-1247(17)30073-6 Images: commons.wikimedia.org/wiki/File:Male_anatomy_en.svg commons.wikimedia.org/wiki/File:Hydra-Foto.jpg