Liquid helium has zero viscosity — it climbs up the walls of its container in a phenomenon called superfluidity.

Creative thinking and IQ are related but not identical.

Terror management theory suggests much of human behavior is unconsciously driven by fear of death.

The Dunning-Kruger effect means people with limited knowledge overestimate competence; experts underestimate theirs.

Cognitive dissonance drives people to rationalize rather than update their beliefs.

Confidence can influence perception of competence.

Eastern and Western philosophies have developed largely independently, yet address many of the same fundamental questions.

The gut-brain axis means gut health directly influences anxiety, depression, and mood — probiotics are being studied as treatments.

The average IQ score is set at 100.