Spanish researchers say climate change impacted human migration . Until 1.4 million years ago it was too cold to inhabit southeast East Africa . But then the climate warmed to 13°C ( 55°F ) and became more humid . This enabled hominins - our distant ancestors - to move to new regions .
Spanish researchers say climate change impacted human migration . Until 1.4 million years ago it was too cold to inhabit southeast Spain . But then the climate warmed to 13°C ( 55°F ) and became more humid . This enabled hominins - our distant ancestors - to move to new regions .