After 22 years in space, NASA's Neil Gehrels Swift Observatory will soon burn up in the Earth's atmosphere.
The letter, which was written in code, had remained a complete mystery as the accompanying key had been lost.
Lobbyists have called for restrictions to be placed on the development of AI systems that are more intelligent than humans.
The four distinctive three-toed prints were found over a distance of 23 feet and date back over 66 million years.
Several decades on, the case of Barney and Betty Hill still continues to spark debate and intrigue.
The mysterious ailment, which causes a burning sensation all over his body, is seemingly relieved by submerging himself in water.
A man who has spent years attempting novel ways to extend his life has revealed that he is battling an incurable health condition.
The primate is only the fifth new species of monkey to be discovered in Africa within the last 75 years.
The find, which is several times older than the Egyptian pyramids, could rewrite the story of America's first human inhabitants.
The topic of UFOs seems to have become increasingly mainstream in recent years and shows no sign of slowing down.
The interstellar visitor is now thought to have been on a voyage across the stars lasting more than 12 billion years.
The greenland shark was always known to be long-lived, but it wasn't until now that it became clear just how long they live for.
The third batch of files is now available to view and download from the Department of War's website.
It has been over 22 years since the ill-fated Beagle Mars lander set down on the surface of the Red Planet.
The find suggests that early humans knew how to use fire hundreds of thousands of years earlier than previously thought.
The iconic Mars spacecraft has ended its mission after more than 11 years in orbit around the Red Planet.
The peculiar skulls, which exhibit strange, elongated craniums, have been the topic of debate and intrigue for years.
The ancient wonder of the world has stood for 4,500 years - but why haven't earthquakes caused it to collapse?
There's a chance that evidence of alien life has been under our noses for years and we have failed to see it.
For years, scientists have attempted to explain the nature and purpose of the huge stone jars littering the landscape.