Background Articles

Heat waves like the one that engulfed parts of parts of the South and Midwest and killed more than a dozen people are becoming more common.

Voles breed like crazy. They can have three or four litters of six to eight kits each summer. Babies are born hairless, but are weaned and on their own in less than three weeks. Females are ready to breed at 30 days.

Scientists say that rising global temperatures are causing collapsing mountains as ancient permafrost begins to thaw.