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Scientists have found thousands of planets that orbit other stars, just like Earth orbits the Sun. Some of them might even be able to support life.

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Every now and then, a human foot washes up on the shore, usually wearing a running shoe. But where did it come from, and where’s the rest of the body.

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Have you ever looked at a lake and wondered why there was a thick layer of green scum on the water? Chances are, you were looking at an eutrophic lake.

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Research, education and medication have all helped reduce the impact of HIV. But viruses also evolve over time, and HIV may be becoming less harmful.

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It’s worth taking the time to understand the nitrogen cycle, because it has many important impacts on the planet. In particular, it helps you and many other living things get the nitrogen they need to survive.

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In the beginning, the Zika virus didn’t seem like the next big news story. But time revealed just how dangerous the Zika virus can be.

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You, me and everyone around us are constantly getting older. Why does this happen? And is there anything humans can do to slow down or even stop the aging process?

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Viruses just don’t meet the requirements to be included in the Tree of Life. And although they have several ideas, scientists aren’t sure where viruses come from.

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HIV is a retrovirus that causes AIDS. But where did it come from, and how did it spread?

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The next time you hear someone say, “Sticks and stones can break my bones, but words will never hurt me,” tell them to think again! Studies suggest that non-physical forms of bullying are just as painful as physical forms.

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