Hydrogen is a colorless gas. But if you’ve done any reading about the future of energy, you’ve likely seen it identified by a number of different colors—ranging from turquoise and aqua to green, ...

Every other Friday on Morning Edition, the Outside/In team answers a question from a listener about the natural world. For the past few weeks, we’ve been tackling queries on the theme of “blue.” What ...

While all dogs are beautiful in their own way, some pups have features that really make them stand out from others. It could be because of their coat's texture, their large ears, their spots, or their ...

First there was “the dress,” then there was the sneakers, now there’s a debate over the color blue. If you’ve ever argued with a friend over whether something is blue or green, you’re not alone. A new ...