The success rate of couples going through IVF is dependent on the age of the man - not only the woman, a US study suggests.

Older men were found to have a lower chance of conceiving than younger men with a female partner of the same age, according to BBC.

Harvard researchers presented their study of nearly 19,000 IVF cycles at the European Society of Human Reproduction and Embryology.

A brain training computer game developed by British neuroscientists has been shown to improve the memory of patients in the very earliest stages of dementia and could help such patients avert some symptoms of cognitive decline.

Researchers who developed the "game show"-like app and tested its effects on cognition and motivation in a small trial found that patients who played the game over a period of a month had around a 40 percent improvement in their memory scores, according to Reuters.

The blue whale is the largest animal that has ever lived. And yet they feed almost exclusively on tiny crustaceans known as krill. The secret is in the baleen, a complex filter-feeding system that allows the enormous whales to strain huge volumes of saltwater, leaving only krill and other small organisms behind. Now, researchers who have described an extinct relative of baleen whales offer new insight into how baleen first evolved. According to Science daily

The findings shed light on a long-standing debate about whether the first baleen whales were toothless suction feeders or toothed whales that used their teeth like a sieve to filter prey out of water, the researchers say. The teeth of the newly discovered species of mysticete, called Coronodon havensteini, lend support to the latter view.

Dinosaurs' faces might have been much more sensitive than previously thought, according to a study -- helping them with everything from picking flesh from bones to wooing potential mates, according to Science Daily.

Experts used advanced X-ray and 3D imaging techniques to look inside the fossilised skull of Neovenator salerii -- a large carnivorous land-based dinosaur - and found evidence that it possessed an extremely sensitive snout of a kind previously only associated with aquatic feeders.

They often have a funny way of showing their affection, but domestic cats may owe their love of curling up on human laps to the ancient Egyptians.

A genetic study on feline remains dating back 9,000 years has revealed a lineage of cats from Egypt began spreading around the world around 3,000 years ago.

These creatures interbred with local animals and left distinct DNA that persist in our pets to this day.

The scientists behind the research believe the Egyptian cats were so successful because they had developed traits that made them better 'companions' than other types of wildcat.