Pamukkale, meaning "cotton castle" in Turkish, is a natural water terrace site located in the Denizli Province of southwestern Turkey. The site contains several hot springs contained by stark, white limestone deposits known as travertines, that are fed by the overflowing, mineral-rich spring waters. People have been bathing here for thousands of years. ...

This sand castle has been etched on a single grain of sand.

Could someone talk some sense into the five people that have bid on this item, please?

According to the description, this is one litre of bottled air from the area affected by the accident at the Chernobyl nuclear power plant.

The anechoic chamber is located at Orfield Laboratory in Minneapolis, Minnesota and was designed for testing out hearing aid equipment. To make sure no outside noises are present, the chamber is hidden behind two vault doors and has sound-deadening wedges covering all of the flat surfaces. Rather than sound bouncing off the walls, ceiling, and floor like a traditional room, the sound is absorbed.

Fire rainbows are a rare phenomenon that only occur when the Sun is higher than 58° above the horizon and its light passes through cirrus clouds made of ice crystals.

These captivating atmospheric displays are scientifically known as circumhorizontal arcs. While the name "fire rainbow" might suggest a connection with fire or rainbows, it's essential to understand that this phenomenon has nothing to do with fire and isn't a true rainbow.

The process behind fire rainbows is intricate. When sunlight interacts with ice crystals in cirrus clouds, the light is refracted, or bent, in a specific way. For a circumhorizontal arc to form, the Sun must be at a relatively high angle in the sky, usually exceeding 58 degrees. This angle allows sunlight to e ...

This beautiful photograph of the aurora borealis lighting up a glacial lagoon in Iceland has won James Woodend the top prize in the 2014 Astronomy Photographer of the Year competition.