
The SciencesAugust 1, 1954
Shrews
Although these tiny mammals are seldom seen they are remarkably common. Some weigh less than a penny, some possess a deadly venom, some are skilled underwater swimmers. All are voracious and nervous

Shrews
Although these tiny mammals are seldom seen they are remarkably common. Some weigh less than a penny, some possess a deadly venom, some are skilled underwater swimmers. All are voracious and nervous

The Metabolism of Hummingbirds
Its remarkably high rate raises such questions as what keeps these tiny creatures from starving at night and how they are able to migrate across the Gulf of Mexico