« previous next »
« previous next »
 

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

Did you know?

Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

Did you know?

There are more sensory neurons in the tongue than in any other part of the body.

Did you know?

The horizontal fraction bar was introduced by the Arabs.

Did you know?

Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

Blocked at every turn by congressional Republicans who hated him, President Obama turned to techniqu Blocked at every turn by congressional Republicans who hated him, President Obama turned to techniqu
Measuring the Activity of Feature Detection Cells Measuring the Activity of Feature Detection Cells
The U.S. Department of Agriculture offers the SuperTracker tool to help you track, analyze, and plan ... The U.S. Department of Agriculture offers the SuperTracker tool to help you track, analyze, and plan ...
Lie prone with your head turned to one side. Put your arms out to your sides and bend your elbows at ... Lie prone with your head turned to one side. Put your arms out to your sides and bend your elbows at ...
What happens when oil tankers wear out? They go to Bangladesh, where they are turned into scrap. ... What happens when oil tankers wear out? They go to Bangladesh, where they are turned into scrap. ...
The mud track grade 1 reading The mud track grade 1 reading
Video: Generalized life cycles for plants and animals Animation

For a complete list of videos, visit our video library