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 ...

Ian Bartoszek (right) and research partner Ian Easterling hold up a large female python located by tracking one of their male scout snakes. These male pythons are used to help locate the big females ...