Did you know?
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Did you know?
Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.
A squirrel in the Cambridge University Botanic Gardens
Figure 7.1 shows the rapid decline in the trust of Americans in government since the 1960s. This de
In 2009, historian Woody Holton described how Abigail Adams shrewdly invested in the Continental Con
To help his students understand the term generalized other, Mead used baseball as an illustration. ...
The constitutional division of Powers Between the National Government and the States
Students working around a computer