At the end of Dr. Seuss' "How the Grinch Stole Christmas!" the titular villain undergoes a literal change of heart. His blood-pumping organ swells to three times its prior size. The ticker of the ...

If a human ate 50 percent of their weight in one sitting, their body might not take it. Their stomach would expand, and their heart would begin trying to furiously pump blood to sustain the metabolism ...

Able to stretch as long as a telephone pole and swallow an antelope or alligator whole, a python is a marvel of nature. Consider how it feeds: In the first 24 hours after devouring its massive prey, ...