Subarachnoid hemorrhage - bleeding into the space around the brain - is often caused by a ruptured aneurysm of one of the brain's blood vessels. Patients with this condition often complain of 'the worst headache of my life,' which is also described by what meteorological term (something more commonly heard in the spring and summer)?

Considering all the tissues and cells in your body, 25 million new cells are being produced each second.