the.com/dense

packing so much into so little that even light gets lost on the way out

means Tightly packed with matter or, of a person, slow to understand and a bit thick.

from From Latin densus, 'thick, crowded, packed close,' which slipped into English through the late medieval period as a learned borrowing. The same root gives us 'condense' (to pack together) and 'density.' The 'stupid' sense — a person whose head is too packed to let an idea through — is a later figurative twist, the same logic that calls a dim mind 'thick.'

black holes
densest objects known, crushing stars into infinite points
neutron star
a teaspoon weighs around a billion tons
osmium
densest natural element, heavier than gold or lead
word origin
from Latin densus, meaning thick or crowded
for instance

manhattan — 27,000 people per square mile, most densely populated urban area in the us

monaco — 26,000 people per square mile, second most densely populated country in the world

dhaka bangladesh — 47,000 people per square mile in city center, one of world's densest megacities

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