'Surprise' discovery of first cave-dwelling fish

Pink, scaleless and with declining vision, the cave loach is the first ever example of a fish found living in a cave. According to BBC.

Researchers say the creature was found by divers in a huge underground cavern in southern Germany.

Experts believe that these loaches are the most northerly species of cave fish ever discovered.

They think they separated from surface-dwelling fishes sometime over the past 20,000 years.

Scientists say that there are some 200 species of cave fish living in various parts of the world, but none had been found until now.

Hair spacing keeps honeybees clean during pollination

With honeybee colony health wavering and researchers trying to find technological ways of pollinating plants in the future, a new study has looked at how the insects do their job and manage to stay clean. According to Science daily.

According to the study, a honeybee can carry up to 30 percent of its body weight in pollen because of the strategic spacing of its nearly three million hairs. The hairs cover the insect's eyes and entire body in various densities that allow efficient cleaning and transport.

How the mouse came to live alongside humans

Mice have been living alongside humans for 15,000 years, according to fossil evidence. According to BBC.

This is earlier than previously thought - and predates the dawn of agriculture.

Scientists believe wild mice crept into settlements in the Levant (Eastern Mediterranean) region to steal wild grains and seeds that ancient people had gathered and stored.

The rodents became what we know today as house mice, enjoying free food and shelter in human homes.

Ravens: Non-breeders live in highly dynamic social groups

Several recent studies have revealed that ravens are among the most intelligent species of birds and even species in general. But which factors caused the evolution of intelligence? According to a common hypothesis life in social groups can drive brain evolution especially when individuals benefit from remembering the identity of conspecifics and the interactions with them. With such knowledge, animals can avoid conflicts with higher ranking group members or develop alliances to gain better access to resources.

Sea Otters Ahead of Dolphins in Using Tools

Sea otters may have been using stone tools for thousands or even millions of years, according to scientists.

It appears otters learned how to use tools long before other marine mammals.

Sea otters are often seen floating on their backs, using rocks to break open shellfish for food.

A genetic study of more than 100 wild sea otters suggests their ancestors living millions of years ago showed this behavior, BBC reported.