Doctors have been baffled by the case of a young Chilean woman who appears to cry tears of blood.
The discovery of preserved mammoth blood could soon make it possible to clone a live specimen.
Doctors in Turkey have detailed the case of a man who exhibited all the traits of a real-life vampire.
Scientists have confirmed the authenticity of a blood sample said to be from the French king.
Several beaches in Sydney have been closed by officials as red algae turned the water a deep red.
The river delta of Camargue in France is home to the peculiar spectacle of water that turns blood red.
A species of giant flea-like insect would have fed on the blood of dinosaurs over 165 million years ago.
Olivia Norton stunned doctors by surviving after being born with almost no haemoglobin at all.
A prehistoric species of flying reptile might have feasted upon the blood of large dinosaurs.
Researchers believe zebras evolved stripes as a way to help keep blood-sucking flies at bay.
Residents of Koscierzyna were shocked when blood started bubbling up from beneath manhole covers.
Tears contain a lot of vital information about our bodies and could help to monitor blood sugar levels.
Researchers are adding live cells to bandages to spur blood vessel growth so wounds heal quicker.
Scientists have taken a closer look at how vampire bats know precisely where to bite in to their victims.
Farmers in Siberia having reported their goats being killed by a mystery creature and drained of blood.
A test able to help estimate how long you have left to live will go on sale in the UK later this year.
Synthetic blood made from cow plasma brings Australian woman back from the brink of death.
Two Italian entrepreneurs have launched a perfume inspired by the scent of human blood.
Pope John Paul II to be honored by having a vial of his blood ensconced in a Polish church.
A decorative gunpowder gourd is thought to contain the dried blood of French King Louis XVI.