Alina Bradford

The adenoids are one type of tonsils. They are found only in children, and shrink over time until they disappear by adulthood.

Rachel Carson challenged the use of pesticides and sparked an environmental revolution.

Lise Meitner was a pioneering physicist who discovered nuclear fission. Her contributions have often been overlooked.

Their horns are made of the same stuff as human fingernails!

The Lunar New Year is one of the world's most celebrated festivals.

Niacin is an essential vitamin that helps the digestive system, skin and nervous system to function.

Lungs are an important part of the respiratory system. Adults take 15 to 20 breaths a minute, which comes to around 20,000 breaths a day.

Russian culture has a long and rich history, steeped in literature, ballet, painting and classical music. Here is a brief overview of Russian customs & traditions.

Alpacas are domesticated versions of a South American ruminant called the vicuña. There are no alpacas in the wild.

Synesthesia is a neurological condition that causes the brain to process data in the form of several senses at once; for example, hearing sounds while also seeing them as colorful swirls.

Polymers are materials made of long, repeating chains of molecules. There are natural and synthetic polymers, including proteins and rubber, and glass and epoxies.

A sprain happens when a ligament gets stretched or torn. The most common type is an ankle sprain.

Chronic traumatic encephalopathy (CTE) is a degenerative brain disease that kills brain cells. However, little is known about this condition.

Rams are male bighorn sheep. They have long, curved horns that they use to fight for dominance.

There are 47 species of deer, including caribou, elk, moose and wapiti.

Jaguars are large cats that can be found in North, Central and South America. They are identified by their yellow or orange coats, dark spots and short legs.

Foxes are found all over the world. In folklore, foxes are typically characterized as cunning creatures sometimes having magical powers.

They're the tallest animal on Earth with necks that are 6 feet tall!

The number of thyroid cancer cases has more than tripled in the past 40 years.

There are about 1,500 species of geckos, a type of lizard found all over the world.

The American bison is the official mammal of the United States and is the largest mammal in North America.

Since the late 1700s, the world's climate has been changing rapidly, mostly due to human causes.

Scabies is a skin condition caused by a microscopic mite. Symptoms include itching and red bumps or blisters.

Camels are mammals with long legs, a big-lipped snout and a humped back. There are two types of camels: dromedary camels, which have one hump, and Bactrian camels, which have two humps.