"Lions and tigers and bears are increasingly becoming night owls because of us, a new study says.
Scientists have long known that human activity disrupts nature. Many mammals will travel to remote areas or move around less to avoid contact with people. They also become more vigilant, and cut down on the time they spend looking for food.
The latest research found even activities like hiking and camping can scare animals. These human activities drive animals to become more active at night.
"It suggests that animals might be playing it safe around people," said Kaitlyn Gaynor, who led the study. She is an ecologist at the University of California, Berkeley. "We may think that we leave no trace when we're just hiking in the woods, but our mere presence can have lasting consequences."
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