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They are large mammals, appearing 7 million years ago, but after 4 million years, they completely disappeared because of changes in the environment.
This is a very strange creature, with a sheep-like face, human-like eyes, rat-like teeth and lizard-like bone structure.
Turkish researchers have rediscovered a species of freshwater fish that hasn't been seen in nearly 50 years.
New DNA evidence reveals the famous woolly mammoth existed in Canada as long as 5,000 years ago, after being thought to be extinct worldwide for several millennia.
Comet Leonard with an 80,000-year orbit is passing close to Earth, becoming the brightest comet of the year and providing a rare viewing opportunity.
Many flying objects glow, move in formation and then suddenly disappear in the airspace between Taiwan (China) and Hong Kong.
New research warns coral reefs in the western Indian Ocean could disappear completely in the next 50 years if urgent action is not taken.
Scientists are just beginning to understand why some viruses disappear, while others cause epidemics that last for centuries.
Professor Ituro Inoue said that the Delta variant accumulates too many mutations in the nsp14 protein, which will cause the virus to lose its self-correcting function in…
Archaeologists have discovered what they believe to be one of Egypt's vanished 'sun temples', dating back some 4,500 years.
A total of 10 tons of cables lying 200 meters below sea level have disappeared without a trace from Norwegian waters.
At this rate, Greenland, one of the largest freshwater reserves on the planet, may disappear in the future.
When the Great Hatti was destroyed, the 'Sea Man' suddenly became the master of a vast area stretching from the Aegean to Palestine.
Many leaders said they had hoped the G20 meeting in Rome would yield more positive results.
Salt Lake Tuz, which has an estimated 250 million tons of salt reserves, is drying up due to climate change and agricultural development.