A US study has reignited debate over the widespread practice of adding fluoride to drinking water. Read more at straitstimes.com.

Do you think you have an above-average IQ? Can your brain process complex details under pressure? IQ tests and brain teasers ...

Not all minds are wired the same. Some people can instantly recognize hidden details, while others get tricked by illusions.

Can You Spot the Hidden Cat in 5 Seconds? Optical illusions with hidden images are a fascinating way to test your IQ, ...

A high-IQ person listens to their intuition as a guiding force. Their sense of self-trust comes from honoring their beliefs ...

Test your IQ and observation skills with this thrilling optical illusion puzzle! Can you find the hidden number 6 among 8s in just 5 seconds?