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How Scientists Found The Oldest Rock On Earth

Scientists recently found the oldest thing on Earth, a zircon crystal, and it dates back to 4.4 billion years ago! Carbon dating is a helpful tool in order to date old things, but it's limited. Trace is joined by Elise Andrew from I F***king Love Science to talk about how exactly scientists were able to find the oldest thing on earth. Read More: Oldest Rock Speck Zeros In On Earth's Cooling Date http://news.discovery.com/earth/rocks... "The oldest remaining grain of early Earth's original solid rock crust has now been confirmed to be a 4.374-billion-year-old zircon crystal from Jack Hills, Australia." Uranium-Lead Dating http://geology.about.com/od/geotime_d... "Of all the isotopic dating methods in use today, the uranium-lead method is the oldest and, when done carefully, the most reliable. Unlike any other method, uranium-lead has a natural cross-check built into it that shows when nature has tampered with the evidence." Gem Found On Australian Sheep Ranch Is The Oldest Known Piece Of Earth, Scientists Find http://www.smh.com.au/technology/sci-... "Scientists using two different age-determining techniques have shown that a tiny zircon crystal found on a sheep ranch in Western Australia is the oldest known piece of our planet, dating to 4.4 billion years ago." Confirmed: Oldest Fragment of Early Earth is 4.4 Billion Years Old http://www.livescience.com/43584-eart... "Ever heard this life advice? When solving a big problem seems impossible, break it into smaller steps." Where Are the Oldest Rocks on Earth Found? http://www.livescience.com/32763-wher... "You don't need to go to a museum to find really, really old things. Ordinary rocks, for example, may be millions or billions of years old, and are free for the taking." Zircon Chronology: Dating the Oldest Material on Earth http://www.amnh.org/education/resourc... "What are the oldest rocks on Earth, and how did they form? The material that holds the greatest insight into these fundamental questions, because it can contain a record of some of the earliest history of the Earth, is a mineral named zircon." Atom Probe http://en.wikipedia.org/wiki/Atom_probe "The atom probe is a microscope used in material science that was invented in 1967 by Erwin Wilhelm Muller, J. A. Panitz, and S. Brooks McLane." Oldest Bit Of Crust Firms Up Idea Of A Cool Early Earth http://www.news.wisc.edu/22568 "A timeline of the history of our planet places the formation of the Jack Hills zircon and a 'cool early Earth' at 4.4 billion years." Hadean Age For A Post-Magma-Ocean Zircon Confirmed By Atom-Probe Tomography http://www.nature.com/ngeo/journal/va... "The only physical evidence from the earliest phases of Earth's evolution comes from zircons, ancient mineral grains that can be dated using the U-Th-Pb geochronometer." Neodymium-142 Evidence For Hadean Mafic Crust http://www.sciencemag.org/content/321... "Neodymium-142 data for rocks from the Nuvvuagittuq greenstone belt in northern Quebec, Canada, show that some rock types have lower 142Nd/144Nd ratios than the terrestrrial standard." Oldest Known Rock on Earth Discovered http://www.nsf.gov/news/news_summ.jsp... "Canadian bedrock more than 4 billion years old may be the oldest known section of the Earth's early crust." Follow Elise on Twitter:   / elise_andrew   Watch Elise on I F***ING LOVE SCIENCE:    / @iflscience   Watch More: How Carbon Dating Works    • Creation v. Evolution: How Carbon Dat...   TestTube Wild Card http://testtube.com/iflscience/new-di... How Did Life Begin?    • How Did Life Begin?   Photo © John Valley/ University of Wisconsin ____________________ DNews is dedicated to satisfying your curiosity and to bringing you mind-bending stories & perspectives you won't find anywhere else! New videos twice daily. Watch More DNews on TestTube http://testtube.com/dnews Subscribe now! http://www.youtube.com/subscription_c... DNews on Twitter   / dnews   Anthony Carboni on Twitter   / acarboni   Laci Green on Twitter   / gogreen18   Trace Dominguez on Twitter   / trace501   DNews on Facebook   / discoverynews   DNews on Google+ http://gplus.to/dnews Discovery News http://discoverynews.com