How many stars are there in the universe?
In our galaxy alone, there are about 100 billion stars.
In the universe that we can see, the number of stars is estimated at 10^22.
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What causes balding?
Balding occurs when hair follicles shrink and become less productive. Instead of the new hairs being cultivated to replace the ones that fall out naturally each day, they are allowed to remain embryonic, at the most, in a light, peach-fuzz stage. Probably some hormonal action triggers the follicles to behave this way, but it is…
How much does lightning heat the atmosphere?
An average bolt of lightning raises the air temperature along its way to about 50,000 degrees Fahrenheit.
If the moon passes between the earth and the sun every month, why doesn’t it eclipse the sun?
The orbit of the moon around the earth is tilted at an angle of about 6 degrees from the plane of the earth’s orbit around the sun. As a result, the moon is usually above or below the line between the earth and the sun, except on certain predictable occasions.
What is the apple of one’s eye?
The apple of one’s eye is the pupil, which was likened to an apple because, in the ninth century, it was believed to be a solid round mass.
Why did George Washington Carver study the peanut?
The scientist George Washington Carver (1864-1943) was trying to find ways to diversify southern agriculture. Long dependent on cotton, the South’s economy was threatened by the boll weevil and depleted soil. Carver showed that the neglected peanut, soybean, and sweet potato could produce hundreds of trade goods and replace soil minerals depleted by cotton. The…
When did dinosaurs become extinct?
Dinosaurs lived during the Mesozoic era, 225 million to 65 million years ago. By the end of that era, all Archosauria (or “ruling reptiles”), except crocodiles, had died.