Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
Did you know?
In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.
Did you know?
About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.
Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Animal extinctions and human population growth.
Horse-human interaction
Recently discovered species Tersicoccus phoenici under microscope
Time Line of Human History From Upper Paleolithic Period to the Present
Underside of human skull
Cladogram showing genetic distances and relationships between human populations