The huge sphere, which measures around 5ft across, is thought to be evidence of an ancient civilization.
The case for a hidden gas giant in the outer solar system continues to go from strength to strength.
A huge flightless bird called Gastornis is thought to have once roamed what is now the Arctic Circle.
The Internet giant has added a rather unusual clause to the small print of one its latest products.
The cloud of gas will trigger an explosion of star formation but will take 30 million years to get here.
NASA's Curiosity rover has photographed a huge wall of sand on the edge of the Martian desert.
A peculiar picture, which shows what looks like a figure walking on the clouds, has gone viral online.
A new analysis of a video taken 8 years ago has suggested an alternative explanation for the sighting.
Military officials have been conducting an investigation after the objects fell from the sky on Saturday.
Despite being around for almost two centuries, Jonathan the Aldabra giant tortoise is still going strong.
A prehistoric species of giant ape went extinct because it couldn't adapt to its changing environment.
An underwater camera has picked up rare footage of a large squid in the waters of Japan's Toyama Bay.
Scientists are hoping to breed hybrid tortoises in a renewed attempt to resurrect two extinct subspecies.
The search giant once attempted to develop a real-life version of the Star Trek communicator badge.
Archaeologists believe that a giant marble hand in Jordan once belonged to a gigantic statue of Hercules.
A bizarre spectacle greeted pedestrians in Arizona this week when a large Halloween display got loose.
Scientists have identified the first ever baby giant squid in specimens fished up off the coast of Japan.
Scientists have revealed the discovery of a new species of giant tortoise on the Galapagos Islands.
New evidence suggests that Australia was once home to huge reptiles that lived alongside early humans.
A giant virus discovered frozen beneath the tundra has been revived after more than 30,000 years.