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Obesity: How much fat can your genes handle?

According to some experts, the popular formula for weight loss, 'eat less, and exercise more,' is not working for many Americans. Recent estimates say that about 34% of adults and 22% of preschool children in the U.S. are overweight. These numbers represent a threat to public health because obesity increases a person's risk of developing diabetes ...

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Obesity
Medicine

How Much Coffee Will Kill You?

With the spread of Starbucks franchises all the way from Portland to Poughkeepsie, Americans are getting used to paying $3 or more for a proverbial ten-cent beverage. Of course, you get a bigger cup, ... Continue reading

HowMuchCoffeeWillYou
Biology

Will That Be One Hump or Two?

Camels are highly adaptive to their environments. Often called the ships of the desert, they have been domesticated by humans for thousands of years, as beasts of burden and as transportation. What ... Continue reading

Humps
Biology

How Did Dogs Evolve?

While the status of the dog as humankind's best and oldest friend remains unchallenged, debate rages about just how far back the friendship goes. Fossils of domesticated dogs appear in the remains of ... Continue reading

HowDidDogsEvolve
Medicine

What Is Autism?

Autism is not a disease, but a developmental disorder of brain function. People with classical autism show three types of symptoms: impaired social interaction, problems with verbal and nonverbal ... Continue reading

WhatIsAutism

Your Senses Make Sense of Energy

EnergySenseYour different sense receptors are designed to gather different kinds of sensory information about the world around you. That information is in the form of different kinds of energy. Your eyes sense light which is electromagnetic energy. Your senses of taste and smell detect chemical energy. Other senses respond to mechanical or thermal energy. But even though your senses are sensitive to different forms of energy, they all convert each of them into a single kind - electrical energy.

If all the sense receptors convert all these different kinds of energy into a single kind, why is it that we have many senses, instead of just one? The answer is that each of the receptors connects to a different part of the brain. So colors, shapes, tones, smells, and flavors are mental constructs created by your brain out of sensory data. It’s the brain that converts the electrical energy into what we know as vision, sound, smell, taste, pressure, pain, or heat.