Standing on a mesa high above the town of Rifle, Colo., Andres Aslan is having a hard time staying quiet. The lanky geologist from nearby Colorado Mesa University normally speaks in a low-key professorial drone. But here, looking down at a sprawling river valley blazing with autumnal cottonwoods, his enthusiasm cranks up his volume. “This could be it,” says Aslan, gesticulating wildly. “This...
Letters to the Editor
The Carolinas to New Jersey11/06/2006 - 13:06 Humans & Society
"Bad-News Beauties: Poison-spined fish from Asia have invaded U.S. waters" (SN: 9/9/06, p. 168) cites evidence of a severe genetic bottleneck, suggesting that perhaps no more than three pregnant females launched the expanding western Atlantic red lionfish population. How can there be "pregnant females" in an animal with the external fertilization described in the...