Did you know?
Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
Did you know?
In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.
Did you know?
The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.
Did you know?
Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.
Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.
Solomon's Seal
The Movius line separates regions of the world where Acheulean hand axes were made from regions wher
Dynamic Response of Thermometers Experiment
A container with gasoline containing alcohol. Notice the separation line where the alcohol-water ...
Operation of a typical pulse generator (pickup coil). At the bottom is a line drawing of a typical ...
Example of pre- and posttest Interpretation in an Experiment