In the Pacific Ocean, Molokini is a tiny yet extraordinary crescent-shaped island. This landmass is a partially submerged ...

Free to enter. This crescent-shaped volcano crater is known as one of the top snorkeling and diving spots in the Hawaiian Islands. Partially submerged, Molokini Crater, boasts 250 varieties of ...

The rocket-powered Gracie will conduct five hops during its short lunar stay, including one into the depths of a shadowy crater. A SpaceX launch later this month will send a new type of lunar ...

The chemical makeup of mineral inclusions preserved in impact glass hints at the site of a missing impact crater. Tektites are natural glass formed when debris falls back to Earth after a ...

Can't decide on your next dive destination? Our Dive Travel Guide is packed with our top recommendations to keep you busy all ...

In less than a minute, a Mexico-bound air ambulance jet that departed Philadelphia on Friday night, climbed to 1,500 feet before it took a steep nosedive, crashing into the ground, and leaving an ...

Kilauea volcano in Hawaii is erupting with fountains of lava. Check out a USGS livestream from within the Halema'uma'u crater. Kilauea volcano entered its fourth eruptive episode on Thursday ...

The island is famed for its caldera – a bowl-shaped crater caused by a volcanic eruption – which was formed by one of the largest known blasts around 3,600 years ago. Santorini’s most recent ...