March 7, 2012 - Dr. Neil deGrasse Tyson speaking at the US Senate Commerce, Science and Transportation hearing on Priorities, Plans and Progress of the Nation's Space Program.

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Hank tells us four incredible things about Jupiter's sixth moon, Europa. Like SciShow on Facebook: www.facebook.com Follow SciShow on Twitter: www.twitter.com Citations for this episode can be found in the Google Document here: dft.ba Credits: Produced by Hank Green Chief Editor: Blake de Pastino Cinematography: Nick Jenkins Video Editor: Matt Ferguson Graphics: Amber Bushnell Written by Blake de Pastino SciShow theme composed by Tom Milsom TAGS: scishow, europa, science, astronomy, jupiter, moon, Galileo, astronomer, water, ice, atmosphere, baseball, life, NASA, space, exploration

Plutonium powered robot car! With a laser gun! That's (kind of) what's hurtling through space right now as part of NASA Mars Science Laboratory heads for the Red Planet. Hank walks you through this historic mission, with the help of some kick ass animations (thanks NASA!). Mars Science Laboratory www.nasa.gov marsprogram.jpl.nasa.gov Follow SciShow on twitter: www.twitter.com Like SciShow on Facebook: www.facebook.com Credits: Produced by Hank Green Chief Editor: Blake de Pastino Cinematographer: Nick Jenkins Video Editor: Matt Ferguson Graphics: Amber Bushnell Written by Dave Loos TAGS: scishow, sci show, mars science laboratory, curiosity, curiosity rover, mars, nasa, jpl, hank green, vlogbrothers, sky crane, spirit, opportunity, mls, frickin, excited, lasers, space

Order your SourceFed Posters here: bit.ly Scientist have a medical breakthrough when they transform human skin cells into functioning heart cells! Our Sources: on.io9.com bit.ly Go to SourceFed.com for our 5 daily videos or anything else we've ever done. youtube.com Follow us on Twitter: twitter.com Like us on Facebook: on.fb.me Philly D OFFICIAL APP for instant updates: bit.ly Hosts: @elliottcmorgan @joebereta Music: @ronaldjenkees

Hank tells us about some developments that are being made in the dramatic area of laser tractor beams. Like SciShow on Facebook: www.facebook.com Follow SciShow on Twitter: www.twitter.com References for this episode can be found in the Google document here: bit.ly scishow, NASA, darth vader, tractor beam, lazer, optical tweezer, photon, light, particle, freeze, push, pull, solenoid beam, electromagnetic field, polarity, goddard space flight center, space junk, discovery, science, physics, hank green

Hank introduces us to the man behind the periodic table - the brilliant Russian chemist Dmitri Mendeleev. Like SciShow on Facebook: www.facebook.com Follow Scishow on Twitter: www.twitter.com References for this episode can be found in the Google document here: dft.ba tags: mendeleev, dmitri mendeleev, russia, russian, siberian, chemistry, periodic table of elements, element, scishow, science, great minds, nerd, professor, principles of chemistry, atom, atomic weight, bigamy, bigamist, czar, vodka, petroleum, oil refinery, nobel prize, mendelevium