References
05 August 2014, 02:03 PM ET
The coyote is a clever animal that has adapted well to growing human populations and habitat loss.
05 August 2014, 12:24 PM ET
Bobcats and lynx are cats that have stubby tails and ears topped with furry black tufts.
04 August 2014, 11:48 AM ET
The platypus is one of the most unusual creatures in the animal kingdom. It looks like it was put together from parts of other animals; females lay eggs, and males are venomous.
01 August 2014, 12:11 PM ET
They are solitary creatures that live about 7 to 12 years in the wild.
31 July 2014, 08:10 PM ET
The fourth week of pregnancy is usually when women discover they are pregnant. Now is the time to take a pregnancy test to know for sure.
31 July 2014, 07:08 PM ET
In the third week of pregnancy, there won't be any major outward changes in a woman's body, but some pregnancy symptoms may have started.
31 July 2014, 02:21 PM ET
Rams are male bighorn sheep. They have long, curved horns that they use to fight for dominance.
31 July 2014, 11:59 AM ET
Buffalo are large bovines that live in Africa and Asia. They are related to American bison, but they are different animals.
30 July 2014, 04:04 PM ET
Bears are omnivorous mammals found all over the world. There are eight species, and most of them are endangered.
30 July 2014, 12:54 AM ET
Pinpointing the exact date of conception is hard to do. Due dates are usually calculated to 40 weeks after the first day of the woman's last period.
29 July 2014, 07:41 PM ET
Puma, panther, cougar and mountain lion are different names for the same species of big cat that can be found from Canada to the southern tip of South America.
24 July 2014, 05:07 PM ET
Testosterone is a male sex hormone that is important for sexual and reproductive development.
24 July 2014, 04:29 PM ET
Sudden infant death syndrome (SIDS), sometimes called crib death, is the sudden and unexpected death of a child under 1 year old that cannot be explained by other causes.
24 July 2014, 03:14 PM ET
Parrots, with colorful plumage and the ability to mimic human speech, are popular pets. This large order of birds includes parakeets, macaws, cockatiels and cockatoos.
23 July 2014, 07:58 PM ET
Liquid is a state of matter between solid and gas. Molecule are farther apart from one another, giving them space to flow and take on the shape of their container.
23 July 2014, 05:16 PM ET
THC is the main mind-altering ingredient found in the Cannabis plant.
23 July 2014, 04:37 PM ET
"Shin splints" refer to pain in the lower leg due to overworked and stressed muscles and bones.
23 July 2014, 04:35 PM ET
Ibex are very agile and can easily climb mountainous terrain with their strong, cloven hoofs.
22 July 2014, 08:55 PM ET
Solid is a state of matter in which the molecules are packed closely together and usually arranged in a regular pattern. A solid object has a fixed shape and volume.
22 July 2014, 04:17 PM ET
The pulse rate measures the rate at which blood pressure increases throughout the body. There are several places on the body where you can find your pulse.
21 July 2014, 05:16 PM ET
These animals are often kept as pets or farmed for their prized fur.
21 July 2014, 05:12 PM ET
Gazelles are a major food source for predators and rely on their speed to escape.
18 July 2014, 06:58 PM ET
Bikram yoga is a type of yoga that involves a sequence of set poses and is usually done in a hot room at or above body temperature.
18 July 2014, 05:28 PM ET
Hormone replacement therapy, also called menopausal hormone therapy, is a treatment for the symptoms of menopause.
18 July 2014, 03:36 PM ET
18 July 2014, 03:34 PM ET
Estrogens are hormones that that are important for sexual and reproductive development, mainly in women. They are also referred to as female sex hormones.
18 July 2014, 03:09 PM ET
Osteoarthritis, the most common form of arthritis, occurs when cartilage between the joints wears down over time.
27 June 2014, 11:54 AM ET
Squirrels are nimble, bushy-tailed rodents found all over the world. There are more than 200 species of squirrels.
26 June 2014, 06:19 PM ET
Newton’s Third Law of Motion states, “For every action, there is an equal and opposite reaction.”
26 June 2014, 06:14 PM ET
Newton’s Second Law of Motion states, “The force acting on an object is equal to the mass of that object times its acceleration.”
26 June 2014, 06:08 PM ET
Newton’s First Law of Motion states, “A body at rest will remain at rest, and a body in motion will remain in motion unless it is acted upon by an external force.”
26 June 2014, 06:04 PM ET
Newton's laws of motion formalize the description of the motion of massive bodies and how they interact.