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Humans

From the November 21, 1936, issue

Wild turkeys, a life-extending diet, and seeing through fog.

Physics

Snow Crystals

This Web site, created by Caltech physicist Kenneth G. Libbrecht, is all about snow crystals and snowflakes. With many beautiful images, it provides a guide to snowflakes, information on growing snowflakes, an introduction to the physics of snowflake formation, and ideas for snow and ice activities. Go to: http://www.snowcrystals.com/

Earth

Balancing Act: El Niños and dust both affect coral bleaching

Most of the annual variation in the extent of coral bleaching in the Caribbean is driven by two factors: the amount of dust and other particles suspended in the atmosphere, and the climate phenomenon known as El Niño.