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Sisters Recall Horror of '71 Rape-Murder
Kathy Gloddy, 13, was attacked in small New Hampshire town after ice cream stop.
Private Eye Hunts for Clues in Murder
Tom Shamshak calls murder of then 13-year-old Kathy Gloddy a "savage killing."
The Disappearance of Melanie Melanson
Family, friends, cops recall night in 1989 when girl, 14, disappeared in woods.
Do Humans Only Care About Themselves?
Part 5 of the 20/20 special "20 Questions: You Never Thought to Ask."
Can a Garden Hose Stop Global Warming?
Part 3 of the 20/20 special "20 Questions: You Never Thought to Ask."
Why Eating Kangaroo Can Save Polar Bears
Part 4 of the 20/20 special "20 Questions: You Never Thought to Ask."
How Your Doctor's Tie Could Kill You
Part 2 of the 20/20 special "20 Questions: You Never Thought to Ask."
Business of Being a High-End Call Girl
Part 1 of the 20/20 special "20 Questions: You Never Thought to Ask."
Do We Only Care About Ourselves?
1964 Kitty Genovese murder symbolized how selfish humans can be.
A Simple Solution to Control Hurricanes
Intellectual Ventures develops ways to reduce hurricane strength, fight malaria.
Why Raw Talent and Genius Are Overrated
"SuperFreakonomics" authors say when it comes to talent, practice make perfect.
Hospitals Save Lives by Washing Hands
Actress who developed hospital infection calls on doctors to improve hygiene.