the.com/hardiness
the stubborn refusal to die that turned weeds into legends and survivors into saints
Plant zonesUSDA maps the cold a plant can survive
OriginFrom Old French hardi, meaning bold or daring
PsychologyStudied as a buffer against stress-driven illness
TardigradesSurvive space vacuum, radiation, and total dehydration
Tested coldSome seeds germinate after freezing for centuries