Outside/In

Whatever happened to the hydrogen economy?

Tinnitus is a persistent ringing or buzzing in the ears, and it's a major issue among veterans. Is there a way to treat it?

From the parasite theory to pollen counts, a look at the multitude of factors that are making allergies worse around the globe.

Enter the fascinating world of venom, where deadly stakes are intertwined with the possibility of wondrous healing.

The dose makes the poison... Or does it?

When potatoes are exposed to sunlight, they produce a compound called solanine. The more solanine you eat, the sicker you can get.

In an area of Ireland hit hard by the Troubles, townspeople are fighting what they say is a new wave of colonialism: tree plantations.

We sing along at concerts. We chant at protests. We belt it out at birthday parties. Why do humans sing together?

In this special collaboration between Outside/In and Tumble Media, we answer a serious question about silly behavior: “Why do some animals play, and some animals don’t?”

Last summer, browntail moths were found in the state for the first time in 75 years. But there's good news.