greatwar-1914:

U.S. Signal Corps telephone operators in an advanced sector, 3 km from
the trenches in France. The women were part of the Signal Corps Female
Telephone Operators Unit and were also known as Hello Girls. They have
helmets and gas masks in bags on back of chairs

U.S. Signal Corps telephone operators in an advanced sector, 3 km from the trenches in France. The women were part of the Signal Corps Female Telephone Operators Unit and were also known as Hello Girls. They have helmets and gas masks in bags on back of chairs

earth-song:

First Warm-Blooded Fish Found by Stephanie Pappas, Live Science Contributor

The car-tire-size opah is striking enough thanks to its rotund, silver body. But now, researchers have discovered something surprising about this deep-sea dweller: It’s got warm blood.

That makes the opah (Lampris guttatus) the first warm-blooded fish every discovered. Most fish are exotherms, meaning they require heat fromthe environment to stay toasty. The opah, as an endotherm, keeps its own temperature elevated even as it dives to chilly depths of 1,300 feet (396 meters) in temperate and tropical oceans around the world.

Keep reading

Wael blood fish

The car-tire-size opah is striking enough thanks to its rotund, silver body. But now, researchers have discovered something surprising about this deep-sea dweller: It’s got warm blood.