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Lift or Drag? The Physics of Flight Quiz

play.howstuffworks.com/quiz/physics-of-flight-quiz

Long before the Wright brothers guided their fixed-wing aircraft over the North Carolina dunes, daredevils and engineers worked to decode the secrets of sustained heavier-than-air human flight. What do you know about the physics of flight?

Can dentists use non-fluoride toothpaste?

health.howstuffworks.com/wellness/oral-care/procedures/can-dentists-use-non-fluoride-toothpaste.htm

Can dentists use fluoride-free toothpaste when you are getting treatments? Find out if dentists can use fluoride-free toothpaste.

Saw-scaled Viper: Opportunistic, Fast and Highly Venomous

animals.howstuffworks.com/snakes/saw-scaled-viper.htm

The Indian saw-scaled viper (Echis carinatus) is one of the most infamous and dangerous Indian snakes. These venomous snakes are known for their speed, aggression and powerful venom, which makes them one of the deadliest snakes to humans.

The World's Most Dangerous Bird and 9 Runners-up

animals.howstuffworks.com/birds/most-dangerous-bird.htm

The most dangerous bird species are also some of the most beautiful. These seemingly innocent creatures can pack a punch — or peck — that you definitely want to avoid.

Green Science Pictures

science.howstuffworks.com/environmental/green-science/green-science-pictures.htm

This green science image gallery shows eco-friendly applications as they apply to scientific disciplines. Take a look at these green science pictures.

So, the American Alligator Can Climb Trees ... How Terrifying

animals.howstuffworks.com/reptiles/american-alligator.htm

The American alligator is the second-largest reptile in North America, falling just slightly behind its cousin, the American crocodile.

Green Sea Turtle: Named for Its Fat, Not Its Scales or Shell

animals.howstuffworks.com/reptiles/green-sea-turtle.htm

The green sea turtle is among the most elegant marine creatures cruising through our oceans. Known for their gentle demeanor and striking appearance, these marine turtles are vital to ocean ecosystems, especially their marine turtle habitat in coral reefs and seagrass meadows.

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