The Marana Police Department in Arizona has released an audio clip which features an unexpected extra.
Researchers from South Korea and the US have created a robot that is capable of walking on water.
An infrequent astronomical phenomenon is due to appear tonight for the first time in three years.
Footage has emerged showing a number of strange white objects moving over the port city of Osaka.
A couple in Chicago have filmed a strange figure dressed as a clown breaking in to a local cemetery.
An ambitious new plan could see carbon dioxide being sucked out of the atmosphere and turned in to fuel.
Scientists believe they have identified what causes thin hair-like strands of ice to form on plants.
The crew of a fishing vessel recorded a huge squid attempting to make off with a fish they had caught.
Astronomers using the Kepler Telescope have found the most Earth-like extrasolar planet ever discovered.
A team from Japan succeeded in fending off robots from 40 other countries at a competition in China.
A young girl from New Zealand has become a social media hit after playing the piano while asleep.
Three polite robots have taken the first tentative steps towards exhibiting a sense of self-awareness.
A nearby asteroid loaded with a platinum core is thought to be worth an unfathomable amount of money.
A highly dubious video showing an impressively detailed object over the US has appeared online.
A video showing a strange shadowy figure moving along a corridor has been uploaded on to the Internet.
Four extinct volcanoes dating back 50 million years have been found on the ocean floor in Australia.
The crew of a TV documentary about sharks used death metal to help them attract a huge great white.
Authorities were alerted after the man tied balloons to a lawn chair and soared in to the heavens.
A new way of growing food underwater is being tested out beneath the Bay of Noli in Savona, Italy.
Scientists in Japan have developed a new type of hologram that can be both observed and touched.