Gorillas’ chest thumping allows females, rivals know their size without seeing them
Earlier research showed that bigger males are more dominant, have higher reproductive success than smaller ones.
from http://www.firstpost.com/tech/science/gorillas-chest-thumping-allows-females-rivals-know-their-size-without-seeing-them-9510391.html
from http://www.firstpost.com/tech/science/gorillas-chest-thumping-allows-females-rivals-know-their-size-without-seeing-them-9510391.html
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