World's biggest known saber-toothed cat roamed the Earth 8 million years ago and was the size of a POLAR BEAR

Researchers have discovered a fossilised skull of a sabertooth cat, which they say is the biggest ever found.

The skull measures around 40 centimetres long, which translates to an enormous estimated body mass of over 892 pounds, and body length of 3.1 metres - equivalent to a male polar bear.

While the cat has the distinctive fangs, its gape was much smaller than other cats, which suggests it targeted smaller prey

The researchers, found the fossil, which is roughly 8.3 million years old, in China's Longjiagou Basin.

Mutant mice become 'super sniffers'

Its stripy back makes it one of the most recognisable of rodents - but until now it has been unclear exactly how the chipmunk earned its stripes.

Now, scientists have found the evolutionary gene change responsible for the distinctive markings of both the chipmunk and an African mouse, according to BBC.

The gene normally makes the bellies of many rodents light in colour.

The venom of one of world's deadliest snakes could relieve pain

A snake with the largest venom glands in the world could hold the answer to pain relief, scientists have found.

Dubbed the "killer of killers", the long-glanded blue coral snake is known to prey on the likes of king cobras, according to BBC.

Venom from the 2m-long (6ft 6in) snake native to South East Asia acts "almost immediately" and causes prey to spasm.

'Bionic' plants can detect explosives

Scientists have transformed the humble spinach plant into a bomb detector.

By embedding tiny tubes in the plants' leaves, they can be made to pick up chemicals called nitro-aromatics, which are found in landmines and buried munitions, according to BBC.

Real-time information can then be wirelessly relayed to a handheld device.

The scientists implanted nanoparticles and carbon nanotubes (tiny cylinders of carbon) into the leaves of the spinach plant. It takes about 10 minutes for the spinach to take up the water into the leaves.

The FRIENDLY dinosaurs: Huge cache of bones suggests bird-like creatures flocked together in social groups

Dinosaurs may not have been the solitary predators that they are often assumed to be.

According to a new study, they were social creatures that flocked together in groups like modern animals.

The research is based on bones from bird-like Avimimus dinosaurs that were found  a decade ago.

The common mythology of dinosaurs depicts solitary, vicious monsters running around eating everything,' explains Gregory Funston, PhD student.

'Our discovery demonstrates that dinosaurs are more similar to modern animals than people appreciate.

The large cache of bones was first discovered in 2006 at the Nemegt Formation in Mongolia.

The area is well known for an abundance of fossils.