human body « How Come?

Does cold weather really make you catch a cold?

People say that if you go outside in cold weather without a jacket, you will “catch a cold.” Assuming that is true, how come? I always thought you “catch a cold” by coming into contact with a virus, writes Michael Green, of Seaford, NY.

Mothers and grandmothers have traditionally raised the cold-weather alarm: Bundle up, [...]

How come humans can’t use sonar in the dark, like bats?

How come humans can’t use sonar in the dark, like bats? asks Kevin Guan, via email.

Listening for the echoes of their own rapid-fire, high-pitched calls, bats navigate the night, while snatching tiny insects from the air. Dolphins (along with many whales and shrews) are also skilled “echolocaters.” And it turns out that we humans, [...]

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Does cold weather really make you catch a cold?

How come humans can’t use sonar in the dark, like bats?