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 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.
Elephant skin is covered in an intricate network of minuscule crevices that retain water and mud, providing a number of benefits.
The strange interaction has never been documented in nature before.
Among the earliest fossils, one marine creature has long baffled scientists.
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.
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.
How close are we to becoming a T. Rex dinner?
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.
Regal jumping spiders can jump six times their own body length.