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Are Pentagon-confirmed UFOs a National Security Threat?

science.howstuffworks.com/space/aliens-ufos/ufos-news.htm

Recently, there's been a spike in UFO sightings - officially UAP, or Unidentified Aerial Phenomena - all over the world and nobody seems to know why or what the objects we're seeing might be.

Why is water vital to life?

science.howstuffworks.com/environmental/earth/geophysics/water-vital-to-life.htm

We know water is vital to life on Earth, but have you ever wondered why? Find out why water is vital to life on Earth in this article.

How Deep Are the Great Lakes? And Why Are They Great?

science.howstuffworks.com/environmental/earth/geophysics/5-reasons-why-great-lakes-are-so-great.htm

The Great Lakes are named so for several reasons. HowStuffWorks looks at why the Great Lakes are so great, including their impressive depths.

NASA's Astronaut Beach House Is a Little-known Gem of Space History

science.howstuffworks.com/nasa-astronaut-beach-house.htm

NASA's historic Beach House on Cape Canaveral is the last place many astronauts visit before they blast off into space. Today it's full of mission memories and NASA artifacts.

Horseshoe Crabs Endangered by Biomedical Bloodletting

science.howstuffworks.com/life/biology-fields/horseshoe-crabs-endangered-biomedical-bloodletting.htm

Horseshoe crabs are a valuable commodity to the biomedical industry, which is not helping their chances of survival. HowStuffWorks takes a look.

What If Humans Could Breathe Underwater?

science.howstuffworks.com/science-vs-myth/what-if/what-if-humans-could-breathe-underwater.htm

Remove that pesky drowning risk, and the world formerly under the sea opens with possibility - despite our inefficient limbs and tendency toward hypothermia.

What's the environmental impact of the Deepwater Horizon oil spill?

science.howstuffworks.com/environmental/energy/deepwater-horizon-oil-spill.htm

The Deepwater Horizon oil spill is one of the worst oil spills in history, and its effects are largely still unknown. Learn about the Deepwater Horizon.

What Is the Arctic Circle? 9 Stone-cold Facts About the Region

science.howstuffworks.com/environmental/earth/geophysics/arctic-circle.htm

The Arctic Circle is a region marked by frigid temperatures, strange sunlight and glaciers galore. And for hundreds of thousands of people, it's also home sweet home.

The Longest Flight in the World Takes Almost 19 Hours

science.howstuffworks.com/transport/flight/modern/longest-flight-in-the-world.htm

If you've traveled between the Americas to Europe or Asia, you're probably familiar with some of the longest nonstop flights available. These commercial flight routes across the Pacific and Atlantic Oceans can easily take over 10 hours to complete, but what is the longest flight in the world?

How Volcanoes Work

science.howstuffworks.com/nature/natural-disasters/volcano.htm

Volcanoes are some of nature's most awe-inspiring displays, with everything from exploding mountaintops to rivers of lava. Learn how all the different types of volcanoes work.

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