Our Alarmingly Close Shave with an Asteroid

How often do we miss asteroids like 2017 OO1, and what are astronomers doing to limit their impact? Meanwhile, distant icy worlds might not look as promising in our search for extraterrestrial life as scientists once thought. Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, D.A. Noe, Charles Southerland, Fatima Iqbal, Sultan Alkhulaifi, Nicholas Smith, Tim Curwick, Alexander Wadsworth, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://earthsky.org/space/asteroid-2017-oo1-close-pass-undetected http://www.purdue.edu/impactearth http://science.howstuffworks.com/nature/natural-disasters/asteroid-hits-earth.htm https://www.space.com/23277-dangerous-asteroids-incredible-technology.html http://www.cnn.com/2017/07/01/us/nasa-asteroid-defense-trnd/index.html https://watchers.news/2017/07/25/asteroid-2017-oo1/ Images: https://en.wikipedia.org/wiki/File:%D0%92%D0%B7%D1%80%D1%8B%D0%B2_%D0%BC%D0%B5%D1%82%D0%B5%D0%BE%D1%80%D0%B8%D1%82%D0%B0_%D0%BD%D0%B0%D0%B4_%D0%A7%D0%B5%D0%BB%D1%8F%D0%B1%D0%B8%D0%BD%D1%81%D0%BA%D0%BE%D0%BC_15_02_2013_avi-iCawTYPtehk.ogv https://commons.wikimedia.org/wiki/File:Europa-moon.jpg https://commons.wikimedia.org/wiki/File:PIA17202_-_Approaching_Enceladus.jpg