The Perils of Wind & Wave Energy

Build enough wind farms to replace fossil fuels and we could seriously deplete the energy available in the atmosphere, with consequences as dire as severe climate change.

Wind and wave energy are not strictly renewable sources of energy, says Axel Kleidon of the Max Planck Institute for Biogeochemistry in Jena, Germany. "Efforts to satisfy a large proportion of our energy needs from the wind and waves will sap a significant proportion of the usable energy available from the sun. In effect, he says, we will be depleting green energy sources. His logic rests on the laws of thermodynamics, which point inescapably to the fact that only a fraction of the solar energy reaching Earth can be exploited to generate energy we can use."

Why American history lives between the cracks

The stories we tell define history. So who gets the mic in America?

Videos
  • History is written by lions. But it's also recorded by lambs.
  • In order to understand American history, we need to look at the events of the past as more prismatic than the narrative given to us in high school textbooks.
  • Including different voices can paint a more full and vibrant portrait of America. Which is why more walks of American life can and should be storytellers.
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Juice is terrible for children. Why do we keep giving it to them?

A glass of juice has as much sugar, ounce for ounce, as a full-calorie soda. And those vitamins do almost nothing.

Pixabay user Stocksnap
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Quick: think back to childhood (if you've reached the scary clown you've gone too far). What did your parents or guardians give you to keep you quiet? If you're anything like most parents, it was juice. But here's the thing: juice is bad for you. 

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Orangutans exhibit awareness of the past

Orangutans join humans and bees in a very exclusive club

(Eugene Sim/Shutterstock)
Surprising Science
  • Orangutan mothers wait to sound a danger alarm to avoid tipping off predators to their location
  • It took a couple of researchers crawling around the Sumatran jungle to discover the phenomenon
  • This ability may come from a common ancestor
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