Clouds weigh around a million tonnes and float due to their low density. Earth's rotation is slowing, increasing day length by 1.8 seconds per century. Sun makes sound but we can't hear it due to pressure waves. Earth's poles are moving at 55 kilometers per year
Carolyn's school cafeteria experiment showed food arrangement can influence children's choices. Choice architects organize contexts where people make decisions. Small design choices can significantly impact people's behavior
Reciprocity is responding to actions with similar or equivalent actions. It dates back to Hammurabi's code and Ancient Greece. Humans evolved reciprocity as an adaptive survival mechanism
Insanity refers to abnormal mental or behavioral patterns. Term "sane" derives from Latin "sanus" meaning healthy. Insanity is informal, un-scientific term denoting mental instability
Social norms are shared standards of acceptable behavior by groups. Norms can be informal understandings or codified rules and laws. Scholars distinguish between regulative, constitutive, and prescriptive norms
Muzafer Sherif studied 22 boys in Oklahoma's Robbers Cave Park. Initially, groups bonded, then competed for resources. Shared tasks eventually led to intergroup reconciliation