the.com/seasonal cycles
the planet's mood swings, scheduled a billion years in advance.
means the recurring pattern of changes in climate, daylight, and biology driven by a planet's tilt and orbit around its star.
from comes from earth's 23.5-degree axial tilt, likely set by a collision with a mars-sized body 4.5 billion years ago, plus the yearly orbit — together they hand each hemisphere a rotating shift of sun exposure.
tilt not distanceearth is closer to the sun in january
deep time prooftree rings and ice cores record ancient cycles
other worlds toomars has seasons lasting nearly twice as long
life syncs upmigration and hibernation evolved to track it