Delta Air Lines chief Ed Bastian asserts that the carrier is unfazed by the recently announced partnership between ...

The blue-eyed ground dove is one of Brazil’s hidden treasures, tucked quietly away in the country’s tropical savannas. It is one of the rarest birds on Earth, and only a lucky few have heard its ...

The ridges of the mortar in between the bricks emit a blue hue, the color of the ocean: indigo, a name that refers to the shrub, the dye the plant produces and the color itself. This crumbling ...

There is nothing like the royal blue of an indigo bunting. In the Northeast, they arrive fashionably late to the spring fling ...

And it's a color that's associated with power, culturally speaking." Blue is also the color of the slave trade: Dyed indigo cloths in West Africa were traded for human life in the 16th century.

Farmer Ellie Maas Davis (right) shows Nathaniel Watkins an indigo plant during a dyeing workshop on Johns Island, South Carolina. The ancient plant is experiencing a revival in the state.

While indigo itself is naturally derived from a plant, growing demand for blue jeans throughout the 20th century gave rise to synthetic indigo, which is now more commonly used. But indigo ...

Here’s how it works. The brown eyes of a 6-month-old boy turned a deep indigo blue after he was given the antiviral favipiravir to treat COVID-19. This case is unusual, but it's not the first ...