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AnimalsGator Feelings: Tough faces, more sensitive than ours
Alligator and crocodile faces carry pressure receptors so responsive that they can detect ripples on the water's surface from a single falling drop.
By Susan Milius -
Anthrax genomes compared for terrorism clues
Investigators seeking clues to last fall's anthrax attack have analyzed the genome of the anthrax bacterium.
By John Travis -
Planetary ScienceHard bodies pair off
About one out of every eight asteroids traveling near Earth has a rocky companion.
By Ron Cowen -
ArchaeologyOpenings to the Underworld
Archaeological finds indicate that ancient groups in Mexico and Central America, including the Maya, held beliefs about a sacred landscape that focused on natural and human-made caves as sites of important ritual activities and burials.