Crypteia

Messenia , homeland of Sparta's helot population, from Mount Ithome .

Temperature map of the cosmic microwave background measured by the Planck spacecraft

01The pigeons roosting inside the horn antenna were trapped and relocated twice before the engineers accepted the hiss was cosmic.
02Penzias and Wilson won the 1978 Nobel Prize in Physics — accidentally, while testing satellite communication equipment.
03Princeton cosmologist Robert Dicke had been building a detector specifically to find this radiation; Penzias called him first, and Dicke told his team: 'We've been scooped.'

Spartan boys earned citizenship by stalking and murdering helot slaves at night, alone, with a knife. The state called it education. The helots called it nothing — they left no record.