Enjoy easy riddles and brain teasers for kids and adults, riddles, logic puzzles, brain teasers. Riddles help your brain to exercise and sharpen your thinking capabilities.
In 2011, people playing Foldit, an online puzzle game about protein folding, resolved the structure of an enzyme that causes an Aids-like disease in monkeys. Researchers had been working on the problem for 13 years. The gamers solved it in three weeks.
