Alina Bradford

Wolves are large carnivores — the largest member of the dog, or Canid, family. Wolves are common to all parts of the Northern Hemisphere.

Wildebeests, also called gnus, are large African antelopes.

Botulism is a rare but serious illness caused by toxins released by bacteria. These toxins are among the most lethal substances known to man.

Sweating is the human body’s way to keep cool through the evaporation of liquid released from the sweat glands.

Heat stroke is a very serious medical condition that causes at least 240 deaths in the United States each year.

Sunscreen is the best line of defense against skin cancer. However, many people aren't using it correctly.

Sunburn is serious. Millions of people in the United States are treated for skin cancer every year.

THC is the main mind-altering ingredient found in the Cannabis plant.

The adrenal glands affect metabolism, blood pressure, the immune system, sex hormones and the body’s response to stress.

The parathyroids are four small glands that play a big part in regulating the amount of calcium in the blood.

Crows are large black birds that are known for their intelligence and adaptability.

Estrogens are hormones that that are important for sexual and reproductive development, mainly in women. They are also referred to as female sex hormones.

Also called ‘gouty arthritis,’ gout is a painful form of arthritis caused by too much uric acid in the blood. Learn about causes, symptoms and treatment.

The pituitary gland is called the master gland of the endocrine system; it controls many other hormone glands in the body.

The testicles are the primary male reproductive organs. They produce gametes, or sperm, and they secrete hormones, primarily testosterone.

These ocean-dwelling mammals evolved from ancestors that lived on land!

Marmosets are the smallest monkeys. They live high in the treetops in South America.

Newts are small semi-aquatic amphibians that possess some interesting characteristics. For example, their skin is toxic and they can regenerate amputated limbs. "Astronewts" have also flown in space.

Gila monsters are the largest lizards native to the United States and one of only two venomous lizards in the world.

Warthogs, as the name implies, are related to pigs, and they have growths on their faces that look like warts.

Venus flytraps are carnivorous plants that lure insects and other small animals to their doom.

Piranhas are South American fish with razor-sharp teeth and a reputation, somewhat undeserved, for feeding frenzies.

The kiwi is a small, flightless bird native to New Zealand.

Porpoises have sleek bodies and large flippers, like their cousins the dolphins. But they are smaller and have different types of fins (or none at all).

Muskrats are large aquatic rodents that are usually found in North American wetlands.