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Understanding the Brain: Development (0:57)
A baby's environment plays just as large a role in its development as its genes. Watch a video brought to you by the Discovery Channel.
How Sunburns Work (0:58)
Sunburns can be painful and dangerous to your health, so doctors recommend avoiding the sun or using sunscreen. Learn about sunburn in this HowStuffWorks video.
Human Body: Bone Strength (2:59)
After being pulled out of his home by a tornado, a man lands in a nearby field with no significant injuries. The strength of his bones protected him. Bones' resiliency is discussed in this Discovery Channel video.
Disease Defense: Immunity and Vaccination (3:06)
Vaccines may protect us from pathogens by causing the body to produce antibodies. Prior to 1955, before a vaccine was developed, many people died from polio.
