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The Mourning Cloak Butterfly Makes Unique Winter Appearances
animals.howstuffworks.com/insects/mourning-cloak-butterfly.htm
The mourning cloak butterfly might not win any contests for flashiest insect, but this species breaks the mold in some surprising ways.
How do dogs' nutritional needs change as they age?
animals.howstuffworks.com/pets/dogs-nutritional-needs.htm
How do dogs' nutritional needs change as they age? Find out how dogs' nutritional needs change as they age at HowStuffWorks.
How did NASA change diapers forever?
science.howstuffworks.com/innovation/nasa-inventions/nasa-change-diapers.htm
How did NASA change diapers forever? Visit HowStuffWorks to learn how NASA changed diapers forever.
Which Bird Mating Dance Is the Most Impressive? Here Are 8
animals.howstuffworks.com/birds/bird-mating-dance.htm
From tropical rainforests to open oceans, many bird species have developed some of the most spectacular moves in the natural world.
Bald Eagle Size, Diet and History as a National Icon
animals.howstuffworks.com/birds/bald-eagles.htm
The national bird of the United States has taken on iconic status as the avian avatar of freedom, but its wingspan and steely gaze guarantee its status in the pecking order of prey birds as a symbol of strength.
What Happens When We Sleep?
health.howstuffworks.com/mental-health/sleep/basics/what-happens-when-we-sleep.htm
Why do we sleep? What happens when we sleep? Learn more about sleep from Discovery Health.
Is it possible to make yourself allergic to something?
Many allergies develop later in life. Learn whether it is possible to make yourself allergic to something at HowStuffWorks.
How the Glasswing Butterfly Flutters (Almost) Invisibly
animals.howstuffworks.com/insects/glasswing-butterfly.htm
At first glance, it might seem like something's missing. The glasswing butterfly (Greta oto) gets its common name from its transparent wings, which can make it almost invisible in flight.
The Biggest Bear Stands 5 Feet Tall on All Fours (Not Even on Its Hind Legs)
animals.howstuffworks.com/mammals/biggest-bear.htm
Polar bears are one of the largest mammals on land; only the African elephant can tower over the polar bear in this corner of the animal kingdom. But how do you measure the biggest bear? By height or by weight?
The Bootstrap Myth: Climbing the Economic Ladder Takes More Than Hard Work
money.howstuffworks.com/bootstrap-myth-climbing-economic-ladder-takes-more-hard-work.htm
Succeeding in the U.S. isn't just about effort. Learn how the 'bootstrap myth' oversimplifies economic mobility at HowStuffWorks Now.