« previous next »
« previous next »
 

Did you know?

Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Did you know?

Thyroid conditions may make getting pregnant impossible.

Did you know?

Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

Pattern development in a human embryo Pattern development in a human embryo
Change in Drawing Abilities from Early to Middle Childhood Drawings become more realistic as fine m Change in Drawing Abilities from Early to Middle Childhood Drawings become more realistic as fine m
Tornado Formation: Supercell Tornado Development Tornado Formation: Supercell Tornado Development
Human Development and Remittances Human Development and Remittances
Early 20th century warming Early 20th century warming
Weeks by weeks fetus brain development Weeks by weeks fetus brain development
Video: Embryonic development - Week 4

For a complete list of videos, visit our video library