Whales and many other animals tend to be right-handed
Blue whales tend to be "right-handed," according to a new study that observed their feeding behavior.
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Dogs, as a group, don't seem to be predominantly right- or left-handed. Individual dogs may prefer one paw or the other.
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Orangutans as a population don't tend to show a preference for hands in some studies. The scientists looked at what hand they used to reach for a PVC pipe. However, orangutans tend to hold their offspring on the right side.
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Gorillas tend to be righties; when tested with a tube with peanut butter inside, they reached more often with their right hands.
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About 90% of humans are right-handed. However, there are, a disproportionate number of lefties among the US presidents, including Barack Obama, Gerald Ford, Ronald Reagan, George H.W. Bush and Bill Clinton. Donald Trump is right-handed.
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Bonobos are typically going to be right-handed, research shows.
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Pacific tree frogs tend to show a slight left-handed preference and jump left when predators threaten, studies show.
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Mouse hand preference seems to be mostly chance. Scientists bred several generations of left-handed mice and found that their offspring was split between right- and left-hand preference.
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With eight tentacles, it may be hard to know whether an octopus is right- or left-handed, but they do tend to show a preference, no matter what the task.
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In experiments, chimps prefer their right hands, both when doing hard tasks and when throwing excrement at people. For unskilled movements like reaching, they don't seem to favor one or the other.
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In eastern gray and red kangaroos, there was a consistent "true" handedness for lefties.
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As a group, cats are more often righties, but male cats tend to be lefties, studies show.