Question 1
Question 2
Ask unlimited questions for free
The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.
More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
For a complete list of videos, visit our video library