The Most Popular Countries as Tourist Destinations

Tourism to a location means big money is coming to town. It's No. 3 in the biggest economic sectors in the world, according to the report from the UN World Tourism Organization. International travel has been on the rise for decades, as…

Krill Facts and Uses

Krill are small animals, yet mighty in terms of their importance to the food chain. The animal gets its name from the Norwegian word krill, which means "small fry of fish". However, krill are crustaceans and not fish, related to shrimp and…

A Guide to the 7 Wonders of the Ancient World

The seven wonders of the ancient world have been celebrated by scholars, writers, and artists since at least 200 B.C. These marvels of architecture, like Egypt's pyramids, were monuments of human achievement, built by Mediterranean and…

Top Funny Sites To Read Every Day

Every day, more than 2 billion people log on to the internet, and there are almost half a billion websites for them to choose from. So which sites should you point your browser towards if you're looking for be hottest web humor out there?…

Introduction to Holography

f you're carrying money, a drivers license, or credit cards, you're carrying around holograms. The dove hologram on a Visa card may be the most familiar. The rainbow-colored bird changes colors and appears to move as you tilt the card.…

Exploring Deep Ocean Trenches

Ocean trenches are long, narrow depressions on the seafloor, hidden deep beneath Earth's oceans. These dark, once-mysterious canyons can plunge as deep as 11,000 meters (36,000 feet) into our planet's crust.

How Bat Echolocation Works

Echolocation is the combined use of morphology (physical features) and sonar (SOund NAvigation and Ranging) that allows bats to "see" using sound. A bat uses its larynx to produce ultrasonic waves that are emitted through its mouth or nose.