About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.
Did you know?
Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.
Cards Used in a Socially Situated Version of the Problem-Solving Test
Effects of Common Herbs in Spa Treatments
The inverse-square law and its effects. Doubling your distance away from a radioactive material ...