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 ...

Are you wondering how many blue colour shades are there you can choose from? Here are the shades of blue from light to dark ...

Speaking to The Telegraph about why so many airlines adopted it into their seat design, he continues: ‘Blue became the colour ...