What year were sunglasses invented?
Inexpensive mass-produced sunglasses were introduced to America by Sam Foster in 1929. Foster found a ready market on the beaches of Atlantic City, New Jersey, where he began selling sunglasses under the name Foster Grant.
Why do we blush when we are embarrassed?
Blushing is a reaction of the sympathetic nervous system and part of our “fight or flight” response. When you’re embarrassed, adrenaline is released, speeding up your heart rate and dilating your blood vessels to improve your blood flow and oxygen delivery.
Can you get stung by a dead jellyfish?
Jellyfish can sting with their tentacles if they brush against you when you’re swimming in the ocean. You also can get stung if you step on a jellyfish, even a dead one. Usually, jellyfish stings will hurt, but are not emergencies.
Why do we see the moon during the day?
As it turns out, whether or not we can see the moon during the day depends on the brightness of its light—which is really just the sun’s light reflecting off of the moon’s surface—and the earth’s rotation. In order for the moon to be visible in the sky, it needs to be above the horizon.
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