Nutmeg is hallucinogenic in large doses due to the compound myristicin — but the lethal dose is very small.

Supercooled water can remain liquid below 0°C and instantly freeze when disturbed.

The foot-in-the-door technique shows that people are more likely to comply with large requests after small ones.

Mental stimulation helps maintain cognitive function.

MDMA (ecstasy) is being tested in clinical trials as a therapy for PTSD — results have been promising.

The anchoring bias causes people to rely too heavily on the first piece of information they encounter.

The Dunning-Kruger effect describes how people with limited knowledge overestimate their competence, while experts often underestimate theirs.

Priming — exposure to one stimulus — unconsciously influences responses to later stimuli.

Aerogel, the world's lightest solid, is derived from silica gel with the liquid replaced by gas — it's 99.8% air.