Deep in Alaska’s Katmai National Park, a perfectly round, 1,600-foot-wide crater has puzzled scientists for decades. Known as Savonoski Crater, this enormous hole appears as though it was carved into ...

(AUSTRALIA) — The discovery of a massive crater formed by the impact of a meteorite more than three billion years ago is changing the way scientists view the history of Earth and the planet’s stages ...

Impact craters are formed when an object from space such as a meteoroid, asteroid or comet strikes the Earth at a very high velocity. This leaves an excavated circular hole on the Earth’s surface. It ...