A video taken in a popular tourist hotspot on an Iranian island shows rain flowing down a cliff, turning the beach and sea ...

and blood-forming stem cells must make about 200 billion new red blood cells each day to keep the oxygen flowing. For many years, scientists assumed that blood production took place in the bone ...

A viral video shows 'blood rain' flowing down an Iranian mountain. This rare phenomenon looks like red rain and is caused by soil rich in iron oxide m ...

For athletes with concussion, persistent postconcussion changes are seen in cerebral blood flow (CBF) and white matter at return-to-play (RTP) and up to one year later, according to a study ...