Younger Dryas
Ancient climate reversal
The Younger Dryas was a period of abrupt climate cooling that occurred roughly 12,900 to 11,700 years ago, interrupting the warming trend at the end of the last ice age.
Named after *Dryas octopetala*, an Arctic flower whose pollen reappeared in European sediments from this period.
The sudden cold snap lasted over a millennium before temperatures rose sharply again.
Scientists debate its cause—a leading theory involves disrupted Atlantic Ocean circulation from glacial meltwater.
The Younger Dryas shows how quickly climate can shift.
Species over 44 kilograms
- mammothsExtinct woolly elephants
- mastodonsExtinct elephant-like mammals
- saber-toothed catsExtinct big cats, oversized fangs
- ground slothsExtinct large mammals, slow-moving
dire wolves · aurochs · extinction event · large mammals · woolly rhinoceros · paleoecology · ecosystem collapse · hunting pressure
Study of rock layers
- geochronologyStudy of geological ages
- sedimentologyStudy of geological deposits
- loessWind-deposited silt layer
- alluviumWater-deposited loose sediment
geochemistry · core samples · radiocarbon dating · paleomagnetism · geomorphology · boundary layer
Ice sheet spreading process
- ice sheetThick glacial landmass covering
- glacierSlow-moving ice mass
- permafrostPerpetually frozen earth layer
- tundraFrigid treeless biome
moraine · drumlins · outwash · till · Greenland ice sheet · ice dam · meltwater · polar desert
Subsistence through wild resources
- stone toolsShaped rocks for tasks
- flintknappingStriking stone to shape tools
- settlementsEstablished communities or agreements
- artifactsHuman-made historical objects
subsistence · Göbekli Tepe · human adaptation · migration patterns · population decline
Study of prehistoric climates
- ice coreGlacial sample revealing past
- ocean circulationMovement of seawater globally
Adapting species to captivity
- cultivationFostering growth through care
- climate adaptationAdjusting to environmental shifts
- cultural changeShift in collective beliefs
megafauna
Species over 44 kilograms
- mammothsExtinct woolly elephants
- mastodonsExtinct elephant-like mammals
- saber-toothed catsExtinct big cats, oversized fangs
ground sloths · dire wolves · aurochs · extinction event · large mammals · woolly rhinoceros · paleoecology · ecosystem collapse · hunting pressure
stratigraphy
Study of rock layers
- geochronologyStudy of geological ages
- sedimentologyStudy of geological deposits
- loessWind-deposited silt layer
alluvium · geochemistry · core samples · radiocarbon dating · paleomagnetism · geomorphology · boundary layer
glaciation
Ice sheet spreading process
- ice sheetThick glacial landmass covering
- glacierSlow-moving ice mass
- permafrostPerpetually frozen earth layer
tundra · moraine · drumlins · outwash · till · Greenland ice sheet · ice dam · meltwater · polar desert · esker
hunter-gatherers
Subsistence through wild resources
- stone toolsShaped rocks for tasks
- flintknappingStriking stone to shape tools
- settlementsEstablished communities or agreements
artifacts · subsistence · Göbekli Tepe · human adaptation · migration patterns · population decline
paleoclimatology
Study of prehistoric climates
- ice coreGlacial sample revealing past
- ocean circulationMovement of seawater globally
domestication
Adapting species to captivity
- cultivationFostering growth through care
- climate adaptationAdjusting to environmental shifts
- cultural changeShift in collective beliefs
- Ice Ageice age, mammoths, saber-tooth cat, mammoth, woolly mammoth
- Climate Erasice age, glacial period, Little Ice Age, cooling period, ice ages
- Ice Agesice age, glacial, glaciation, glacial period, ice sheet
- glaciationice age, glacial period, glaciation, ice sheet, glacier retreat
- extinctionmass extinction, dodo, extinct, extinction event, extinction rate
- Holocene ClimateLittle Ice Age