Science Fail: Shaky Assumptions Topple Long-Held Notions
October 3, 2017
Science is supposed to be self-correcting, we're told. But when towers of belief are built on assumptions later shown to be false, the consequences can be monumental.
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Archive Classic: The Mystery of the Ultra-Pure Sandstones
May 6, 2017
Reprinted from June 27, 2003, this mystery is worth considering still. What caused these global deposits that are not being formed today? R. H. Dott, Jr (Univ. of Wisconsin) has a problem. He’s been trying to explain a geological puzzle for 50 years, and it is still unresolved.
Gold, Earthquakes, and Time
March 17, 2013
How long does it take to form veins of gold in the rock? (a) millions of years; (b) less than a second.