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What is the neurochemistry of happiness?
science.howstuffworks.com/life/neurochemistry-of-happiness.htm
There's a connection between our physical bodies and the way it responds to emotion -- but scientists aren't quite sure what it is. Could it be that happiness is little more than a series of neurochemical responses to the world around us?
What is apoptosis?
science.howstuffworks.com/life/cellular-microscopic/apoptosis.htm
Apoptosis is also known as programmed cell death, and is the reason your fingers are no longer webbed. See what apoptosis has to do with curing disease.
Convergent Evolution: When a Good Idea Moves Between Species
science.howstuffworks.com/life/evolution/convergent-evolution.htm
Organisms not related to each other can develop similar physical attributes without even exchanging notes.
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.
The Time Two Russian Space Tortoises Beat Apollo to the Moon
science.howstuffworks.com/space-tortoises.htm
Yep, two small-bodied Russian tortoises made it to the moon and back before man did.
Every Kind of Taipan Snake to Avoid in Australia
animals.howstuffworks.com/snakes/taipan-snake.htm
The taipan snake is one of the most venomous snake species in the world, with an intimidating reputation and an arsenal of potent venom.
What Does the 7th House Represent in Astrology?
entertainment.howstuffworks.com/horoscopes-astrology/7th-house-astrology.htm
Discover how the 7th House in astrology shapes love, partnerships, and marriage dynamics, revealing deep insights into relationship compatibility and commitment.
When It Comes to Air Pollution, the Tiniest Particles Might Be the Worst
Ultrafine particle pollution isn't yet regulated under federal air quality laws. HowStuffWorks takes a closer look at ultrafine particle pollution.
Chimerism: You Can Be Your Own Twin
science.howstuffworks.com/life/genetic/chimerism-be-own-twin.htm
Tetragametic chimerism occurs when a single organism has two genetically distinct types of DNA.
Ringling Bros. Retiring Elephants Early. PETA Still Not Smiling
All 11 of the circus's touring elephants are headed for a Florida retirement in May. Learn more about Ringling's elephants at HowStuffWorks Now.