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How do Astronauts Poop in Space?

science.howstuffworks.com/bathroom-in-space.htm

A bathroom in space requires unique engineering that is different from a bathroom on Earth. Learn about the features of a bathroom in space.

The Stratosphere Is Home to Earth's Ozone Layer

science.howstuffworks.com/environmental/earth/geophysics/stratosphere.htm

The stratosphere is one of Earth's five atmospheric layers that also includes the troposphere, mesosphere, thermosphere and exosphere.

Why Photosynthesis is Important

science.howstuffworks.com/science-vs-myth/what-if/what-if-photosynthesis-stopped.htm

Remember learning about photosynthesis when you were a kid? Let's pretend for a moment that this vital process could somehow permanently stop. How tough would it be to continue to live on this Earth?

Evolution by Natural Selection: Examples and Effects of Adaptation

science.howstuffworks.com/life/evolution/natural-selection.htm

Natural selection is the idea that organisms that are best suited to survive pass their traits down. Is it true that only the strong survive?

How Animal Testing Works

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Animal testing has a long, gruesome history, but it's also saved countless human lives.

Was Lyme Disease Created as a Bioweapon?

science.howstuffworks.com/science-vs-myth/what-if/lyme-disease-bioweapon.htm

Maybe it's mistrust of the U.S. government and health-related industries, as well as Lyme's insidious nature, that makes this idea catnip for conspiracy theories. But what's the truth?

How Space Collisions Work

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Space collisions happen when stars, asteroids and even galaxies smash into one another. Learn what space collisions look like and what the results are.

What Makes Bog Bodies Different From Desert Mummies?

science.howstuffworks.com/environmental/earth/archaeology/peat-bogs-are-freakishly-good-at-preserving-human-remains.htm

What makes peat bogs so perfect at preserving human remains? We look at what's behind these waterlogged areas of decaying plant matter.

Siberia's Batagaika Crater Just Keeps Growing, and That's Not Good

science.howstuffworks.com/environmental/earth/geology/batagaika-crater.htm

It's known as the "Gateway to Hell" and while it might not actually get you there, what it will unleash if it keeps thawing could truly be hellish.

Otzi the Iceman Ate a High-fat Last Meal

science.howstuffworks.com/life/biology-fields/otzi-iceman-ate-high-fat-last-meal.htm

Researchers say that Otzi, the ancient man found in the Alps in 1991, lived on a diet loaded with fat to maintain warmth and energy in his cold, high-altitude environment.

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