the.com/tropics
the belt around earth's waist where the sun refuses to leave straight up.
means The region of Earth near the equator, between the Tropic of Cancer and Tropic of Capricorn, where it's warm year-round and the sun passes directly overhead.
from From Greek 'tropikos' (of a turning), from 'tropos' (a turn), tied to 'trepein' (to turn). It originally described the solstice points — the places along the sun's annual path where it 'turns back' after reaching its northernmost or southernmost point in the sky. The lines of latitude marking those turning points became the Tropic of Cancer and Tropic of Capricorn, and the sun-drenched band between them inherited the name.
- boundary lines
- defined by sun hitting overhead at solstices
- seasons
- wet and dry replace summer and winter
- biodiversity
- host most of earth's species in least land area
- day length
- barely changes between june and december