Biology

Chlamydia in koalas can lead to blindness, infertility and death. The disease is an important factor in the population declines that the species is experiencing.

It has long been thought that the first animals evolved from single-celled organisms resembling microbes called choanoflagellates that are found in water today.

The unusual creature has an extra eye socket in its skull.

The tiny critters could perch on your thumbnail.

Scientists discovered the hidden fluorescence by accident.

And for some of them, sex lasts 40 to 70 hours.

Some elephant bird species grew to heights of around 10 feet tall and could weigh up to 1,800 pounds.

Birds have a highly efficient respiratory system which enables them to sustain powered flight.

Elephant skin is covered in an intricate network of minuscule crevices that retain water and mud, providing a number of benefits.

The giant bird could grow up to 10 feet tall.

Some modern mammals have a bone inside their penis, called the baculum.

Salt is a crucial nutrient that is critically important for various physiological processes.

The strange interaction has never been documented in nature before.

The science behind why people become lefties remains inconclusive.

Among the earliest fossils, one marine creature has long baffled scientists.

The finding could help scientists better understand how organs are formed in the body.

The parasite infects a staggering 30-50% of the world's population.

There may have been two periods when conditions on the lunar surface were sufficient to support simple lifeforms.

Tree shrews are a small mammal species native to southeast Asia.

"A rarely seen horror."

The Gaia hypothesis proposes that life, through its interactions with the Earth's crust, oceans, and atmosphere, produced a stabilising effect which has enabled it to survive under conditions which would have wiped it out on non-regulating planets.

Organisms grew larger to spread their offspring as far as possible, according to a new study.

How close are we to becoming a T. Rex dinner?

Findings suggest that psychedelics could be used to treat a host of mood and anxiety disorders, such as depression, anxiety, addiction and post-traumatic stress disorder.

Currently, most anti-depressants are based on one hypothesis of how the mental disorder arises.

The animal resembled a wolf but had some unusual characteristics.

Sleeping in over the weekend could counteract the negative effects of short sleeps during the week, according to a new study.

Researchers transplanted the "memories" using genetic material.

Puppies appear the cutest at the point at which their mothers stop weaning them, according to a new study.

Regal jumping spiders can jump six times their own body length.