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Your search for "why" returned 10,415 results
Why would scientists want to create a hybrid human-cow embryo?
science.howstuffworks.com/life/genetic/human-cow-embryo.htm
This week, a group of London-based scientists requested official permission to begin a three-year study involving stem cells derived from human-cow hybrids.
Why Some People Can't Sleep Without a Fan
health.howstuffworks.com/mental-health/sleep/disorders/people-cant-sleep-without-fan.htm
HowStuffWorks investigates what makes fans so great at keeping you asleep.
Why Are Cats So Obsessed With Laser Pointers?
animals.howstuffworks.com/pets/cats-laser-pointers.htm
What makes cats hunt a laser pointer? Learn more about cats and laser pointers in this HowStuffWorks Now article.
The Science Behind Why We All Have Snot
health.howstuffworks.com/human-body/systems/respiratory/mucus.htm
Believe it or snot, almost every living creature has some kind of mucus - because mucus does so many things. A study found mucus was so beneficial to mammals, it evolved independently in species.
Why would circumcision decrease a man's risk of contracting AIDS?
science.howstuffworks.com/environmental/life/cellular-microscopic/circum-aids.htm
The results of three recent studies show that an uncircumcised man is twice as likely to contract AIDS from an infected woman as is a circumcised one.
Why do we need warriors?
people.howstuffworks.com/need-warriors.htm
Warriors have evolved over the years as new technologies have been developed. Learn about warriors in this article.
Why Don't Manx Cats Have Tails?
animals.howstuffworks.com/pets/manx-cat.htm
The most obvious feature of Manx cats is their lack of a tail, but there is a lot more to them than that, including the fact that they have dog-like personalities and make great pets.
Why Are Some Comets Green?
science.howstuffworks.com/green-comet.htm
News headlines talk about a rare green comet appearing in the sky. The comet itself is rare, but green comets, not so much. What makes some comets appear green?
How and why does the heart pump blood to itself?
health.howstuffworks.com/human-body/systems/circulatory/heart-pump-blood.htm
Have you ever stopped to wonder how does the heart pump blood to itself and the rest of your body? Learn the answer to how does the heart pump blood.
Why Are There Dozens of Dead Animals Floating in Space?
science.howstuffworks.com/dead-animals-in-space.htm
Neil Armstrong may have been the first man on the moon, but he wouldn't have gotten there without fruit flies, rhesus monkeys or a dog.