Jessie Szalay

REFERENCE Martin Luther King Jr. was a civil rights leader who fought for racial and economic justice. His oft-quoted "I Have a Dream" speech made an incredible impact on the country's racial, cultural and intellectual landscape.

Watermelons are good for you, provide many health benefits and are packed with nutrients. They are also deliciously refreshing, low in calories and fat-free.

reference Cucumbers have many nutritional benefits, are low in calories and high in valuable nutrients.

Reference Here's what to know about brown recluse spiders and how to avoid getting bitten by them.

Discover where cottonmouth snakes live, how to identify them, and whether they are venomous and aggressive.

Cantaloupe is a tasty nutrient-packed melon that's low in calories.

Everything you need to know about dietary fat and why including the right fat in your diet is important for good health.

Egg whites are high in protein and low in just about everything else.

Chocolate, the most popular sweet treat in the world, makes you feel good and might be good for you, too. (At least a little.)

Reference Copperhead snakes are common in North America, and have the distinction of biting more people in the United States than any other snake.

Hernán Cortés was a Spanish conquistador who conquered the Aztec Empire in the early 16th century.

Reference Fiber is vital for healthy digestion. Here’s how it works – and what to do if you’re not getting enough

REFERENCE Wolf spiders are a large family of hairy and athletic arachnids that chase down prey on the ground rather than catching food in webs.

Reference Everything you wanted to know about Anacondas including size, types, and conservation.

Reference North American brown snakes are nonvenomous, unlike the Australian variety, which is among the most venomous in the world.

Grapes are versatile fruits packed with nutrients and antioxidants and can be used in a wide range of popular foods and drinks, such as wine.

Reference Here’s everything you need to know about the liver, from its function and location in the body, to diseases that affect the organ.

Reference Chromosomes are thread-like structures made up of deoxyribonucleic acid (DNA) and carry hereditary information for everything from height to eye color.

Reference Onions have layers of health benefits and are packed with nutrients. Some of the nutrients in onions may help promote heart health, reduce inflammation and reduce the risk of cancer.

Reference Almonds, the most popular nuts in the United States, are full of nutrients and may promote heart healthiness.

Reference Celery enjoys a number of health benefits and contains a sizable dose of fiber, along with some vitamins and minerals.

Reference Potatoes are often thought of as a comfort food, but when prepared in the right ways, these vegetables offer a lot of nutritious value.

Rat snakes are medium-to-large, nonvenomous snakes that kill by constriction. Recent research has complicated the taxonomic classification of rat snakes.

reference Spiny on the outside, sweet on the inside, pineapples are one fantastic fruit.

Reference Amerigo Vespucci was a 16th century explorer, after whom the American continents are named.