For more than a century, visitors to a remote California lakebed have stared at long, ruler-straight tracks etched into the mud and wondered how heavy boulders could apparently glide on their own. The ...

Frogs are slimy, noisy and often colorful. But what about freakishly strong, helicopter parents? New research shows that Goliath frogs -- the world's largest frog species, found in Cameroon and ...