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High Altitude

Have you ever read the directions on a box of cake mix? There are special instructions for high-altitude baking. Has anyone who visited the Rocky Mountains told you how hard it was to breathe there? Have you ever wondered why pilots who fly in high-flying planes wear breathing masks? In higher altitudes, reduced air pressure makes it harder for ...

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HighAltitude
Biology

What's Blindsight?

Some people become blind after suffering an injury to their primary visual cortex at the back of their brain. Since the visual processing part of their brain is damaged, they can't see. Or can they? ... Continue reading

Blindsight
Biology

Fahrenheit 98.6

When you're well, your body temperature stays very close to 37o C. (98.6o F.), whether you're playing basketball in an overheated gym or sleeping in the stands at an ice hockey game in a snowstorm. ... Continue reading

Fahrenheit986
Geology

Crater Lake

Crater Lake: overwhelmingly yet sublimely beautiful. Moody. At times brilliantly blue, ominously somber; at other times buried in a mass of brooding clouds. The lake is magical, enchanting - a remnant ... Continue reading

CraterLake
Chemistry

Uses Of Hydrocarbons

The hydrocarbons are the most broadly used organic compounds known, and are quite literally the driving force of western civilization. The greatest amounts of hydrocarbons are used as fuel for ... Continue reading

UsesOfHydrocarbons

When Did A Cat Become A Kitty?

WhenDidACatBecomeAKittyIt has long been thought that cats were first domesticated in Egypt, about 4000 years ago. Indeed, they were very highly thought of in ancient Egyptian society. It was illegal to kill or harm them, and illegal to export them to other countries. When they died, they were often mummified in the same way as deceased human bodies. In fact, archaeologists working in Egypt have found more cat mummies than human mummies!

Unlike dogs, which are thought to have been domesticated by hunters, cats were domesticated by farmers. Stored grain attracted mice and rats to human settlements, and the ready supply of rodents attracted cats. People were glad to have the cats killing off the mice and rats, and gradually a friendly relationship developed. But in ancient Egypt cats were always free to come and go as they pleased!

New evidence recently published in Science suggests that cats were actually domesticated much earlier, over 9000 years ago, in Cyprus, not Egypt. Cyprus is an island at the eastern end of the Mediterranean Sea, near Turkey. Archaeologists working in Cyprus found a cat skeleton buried near that of a human. The skeleton is complete, showing that the cat was buried shortly after death. It appears to have been buried together with the human remains, perhaps because the dead person’s family regarded the cat as an important individual. Possibly the cat was killed so it could accompany its owner in the afterlife.