Science

It was the brightest supernova recorded since 1604.

Aa is basaltic lava and is characterized by a rough, jagged surface. It forms rare but large gas bub ...

The British pound was initially worth 1 pound of 925 silver jewelry.

A bright band of stars, gas, and dust runs through the center of the galaxy (forming a bar), with ar ...

It is most common in girls and young women, although recently the disorder has been increasingly obs ...

However, it becomes dull upon contact with ozone, hydrogen sulfide, and air polluted with sulfur compounds. Silver halides slowly decompose when exposed to light.

Common forms are aa, pahoehoe and pillow lava.