Look up on a clear sunny day and you will see a blue sky. But is this the true color of the sky? Or is it the only color of the sky? The answers are a little complicated, but they involve the nature ...

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, ...

The international dialogue about climate change and the “net zero” world now includes a focus on hydrogen as an abundant source of energy useful in myriad ways (refining, fertilizer production, motive ...

Chromhidrosis is a rare chronic condition that causes sweat to have a color — possibly black, blue, green, yellow, or brown. In this article, learn more about what chromhidrosis is, what causes it, ...

MULHOUSE, France (Reuters) - Bees at a cluster of apiaries in northeastern France have been producing honey in mysterious shades of blue and green, alarming their keepers who now believe residue from ...

Dogs may be human’s best friend, but canines have a very different view of the world around them. In particular, they see only in shades of blue and yellow — at least that's according to one online ...