It gives you time to stand for an hour, as I did one day, looking at the ocean crash
upon jagged rocks and unpack thoughts usually masked by work or errands or relationships.
The study's conclusions are based
upon brain activity in modern individuals taught to create two types of ancient tools: simple Oldowan - era «flake tools» — little more than broken
rocks with a
jagged edge — and more complicated Acheulian - era hand axes, which resemble a large arrowhead.