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How the Doomsday Ark Works
science.howstuffworks.com/doomsday-ark.htm
If the Earth is struck by calamity, will survivors find salvation in the proposed Doomsday Ark? The lunar-based vault will contain information that could help jumpstart a new civilization.
Everyone's on the Hunt for the Element Lithium
science.howstuffworks.com/environmental/earth/geology/lithium.htm
The element lithium is one of just three created during the Big Bang and has been used for mental health care for decades. But now it's in higher demand than ever before.
Platinum: What's So Special About the Shiny Metal?
science.howstuffworks.com/environmental/earth/geology/platinum.htm
This white-hot metal not only makes beautiful jewelry, it's coveted for industrial, medical and military purposes too.
Sorry, but Only People in Their 30s Can Answer These Questions!
play.howstuffworks.com/quiz/sorry-only-people-their-30s-can-answer-these-questions
Are you an older Millennial? If so, you're going to ace this quiz about all things cultural and factual! Let's get going!
Can You Name All 40 of These Flowers?
play.howstuffworks.com/quiz/can-name-40-flowers
How well do you know the flowers of the world? If you were given images of 40 of these plants, would you be able to guess what they are? Take this quiz to find out!
Can You Identify These Underrated Dog Breeds?
play.howstuffworks.com/quiz/can-identify-underrated-dog-breeds
The Labrador may be the most popular breed, but that doesn't mean these fine dogs don't have much to offer! Let's see if you can identify them!
How Good Are You at Spelling, Really?
play.howstuffworks.com/quiz/how-good-are-you-at-spelling-really
Think you're a good speller? Let's put that to the test! We're going beyond "the" and "teh", "broccoli" and "brocoli" or "truely" and "truly" to quiz you on some of the hardest words for English speakers to get right.
Can You Identify These World War II Planes From an Image Without Any Hints?
Up and away and zooming through the skies, do you think you have what it takes to identify these beautiful aircraft from World War II? You do? Well, let's test your knowledge then, shall we?
Can You Name All 50 Famous Paintings In This Quiz?
Do you remember art history from school? Are you the type of person who loves to spend all day at museums? If so, this is the quiz for you! Test your knowledge and see if you can identify all 50 famous paintings.
10 Best Roofing Materials for Warmer Climates
home.howstuffworks.com/home-improvement/construction/green/10-best-roofing-materials.htm
The first real line of defense against the heat is a building's roof. And some materials are better than others -- especially in hot climates. See which ones are best at keeping the heat at bay.