Body

Black jaguars, like the cub on the left, have a mutation that causes them to produce more of the pigment melanin than spotted jaguars do.

Evolution in Black and White

The alternative color forms of some animals are providing new insights into how animals adapt and evolve

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Picture of the Week—Optical Illusion

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Lincoln vs. Darwin (Part 3 of 4)

We asked: Who was more important, Abraham Lincoln or Charles Darwin? T.A. Frail took up the fight for Lincoln, and Laura Helmuth argued for Darwin

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How Many Ugandan Mountain Gorillas?

Mountain gorillas are rare and endangered, and they have the misfortune to live in a part of the world wracked by human violence

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This is Your Brain…In Cake

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Why Golfers Might Need Earplugs

The golf course would seem to be a quiet and peaceful place, so why did an audiologist recommend that some golfers wear earplugs?

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The Language of Drunkenness

How often do you get drunk? Intoxicated? Inebriated? Tanked? Hammered? Wasted? Plastered? Sloshed? Tipsy? Buzzed?

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Facial Expressions Electrified

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Get to Sleep Before You Lose Your Senses and Your Money!

If you don't get back to sleep, you risk forgetting what you learned, impairing your ability to learn, and preventing yourself from extracting concepts

Nicotine

Feeding on Nicotine

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Last Page: Weight of the World

The battle of the bulge goes global

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Hooked on Aging

Our writer tries to just say no to getting older

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Eureka! Fell Swoops and Stubborn Molars

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Harmonious Cord

MIT's campus

Charting the Terrain of Touch

At MIT's Laboratory for Human and Machine Haptics, researchers are probing the inner workings of our hands

Human embryonic stem cells in cell culture

Ailing? Just Add Cells

Now we can grow the cells from which all others derive, but ethical questions are involved

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Oh, My Aching Back

At the University of Vermont, scientists work to pinpoint the source of your pain

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In the Land of the Long-Distance Runners

Mexico's Copper Canyon is home to great athletes, the Tarahumara

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Traveling Light' Has New Meaning for Jet Laggards

From light therapy to melatonin, research into our bodies' daily rhythms has led to promising treatments for weary travelers

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How the Body Defends Itself From the Risky Business of Living

Our cells take trillions of 'hits' each day from toxins both natural and man-made, but hardworking enzymes repair the damage

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