« previous next »
« previous next »
 

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Did you know?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Did you know?

The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

Did you know?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

Did you know?

Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

The Dingo was the first placental mammal introduced to Australia, around 4000 years ago The Dingo was the first placental mammal introduced to Australia, around 4000 years ago
Model of a sequential study in which two cohorts were followed beginning at age 20. One cohort was f Model of a sequential study in which two cohorts were followed beginning at age 20. One cohort was f
Early-maturing boys tend to be advantaged because they often fit cultural ideals of masculinity. Early-maturing boys tend to be advantaged because they often fit cultural ideals of masculinity.
Average Years of Schooling versus GDP per Capita Average Years of Schooling versus GDP per Capita
Pangaea 200 Million Years Ago Pangaea 200 Million Years Ago
Population age 65 and over and age 85 and over, selected years 1900-2008 and projected 2010-2050. Population age 65 and over and age 85 and over, selected years 1900-2008 and projected 2010-2050.
Video: Membrane Protein and Facilitated Transport (Passive Vs Active)

For a complete list of videos, visit our video library