Zircons Are Forever
Special | 59m 49s | Video has closed captioning.
John Valley, Professor, Department of Geoscience, UW-Madison, joins “University Place Presents” host Norman Gilliland to discuss his discovery of the oldest material ever found on earth: a 4.4 billion-year-old zircon mineral found in the Jack Hills of Western Australia.
Aired: 05/21/14
