Life & Evolution

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red howler monkey

DEEP ROARS, SMALL SPERM STORES  In nine species of howler monkey, researchers found an inverse relationship between testes size and size of the hyoid bone, part of the vocal tract.

Fossil Finder screenshot

INTERNET SEARCH  To better understand the past environment of Kenya’s Lake Turkana Basin, asks volunteers to scrutinize thousands of aerial photos taken at the site.

Ptyas mucosa fossil

SEE-THROUGH SKULL  X-ray scans of the skulls of lizards and snakes, including Ptyas mucosa, the oriental rat snake, reveal clues that today’s snakes descended from burrowers.

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