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Exposure to car exhaust from leaded gas is calculated to have lowered the IQ of about half of the U.S. population, according to a study published in the journal Proceedings of the National Academy of Sciences.
Exposure to car exhaust from leaded gas is calculated to have lowered the IQ of about half of the U.S. population, according to a study published in the journal Proceedings of the National Academy of Sciences.
"it's not only for us in this generation maybe for the generation of our kids or our grandkids who will see the difference later in life."
Pigeons are an urban nuisance to many, however, they also have astonishing cognitive abilities. The birds can even distinguish between the art styles of Picasso and Monet.
Corvids and parrots might be the superstars of the bird world - but other species like gulls, geese and even chicken have shown some impressive skills too.