How do scientists determine the age of fossils that have been under the surface of the earth for thousands of years? Scientific American Editor Michael Moyer explains the process of radiocarbon dating.
Deadline: Jun 29 2013
Reward: $7,000 USD
The Seeker for this Challenge desires proposals for chemical methods that could rapidly degrade a dilute aqueous solution
Deadline: Jul 25 2013
Reward: Varies
This challenge provides an opportunity for Solvers to build a web-based or mobile “app” to explore data relationships in scholarly conte
Powered By: 
3 Comments
Add CommentThere was no sound available on this for me - tried a couple of browsers (chrome, IE). A possible problem??
Reply | Report Abuse | Link to thisThank you so much!! This is great and will be easy to reference and remember. It's easy for us sciency types, and even easier for non-sciency folks, and will help me, as a Guide/Instructor in Yellowstone National Park, have more credibility when talking age of 'stuff'.
Reply | Report Abuse | Link to thisHello Mark. Sorry you're having trouble - we test in many different browsers and we're not able to recreate this problem. For best results, please make sure your browser is set to accept cookies and is Javascript enabled. For further assistance, please email us at webmaster @ sciam.com
Reply | Report Abuse | Link to this