NEW YORK (AP) - A new study said lions and tigers and bears are increasingly becoming night owls because of us.
Scientists have long known that human activity disrupts nature. The latest research found even activities like hiking and camping can scare animals and drive them to become more active at night.
Researchers led by University of California, Berkeley, analyzed 76 studies involving 62 species in six continents. Animals included lions in Tanzania, otters in Brazil, coyotes in California, wild boars in Poland and tigers in Nepal.
They found fear of humans has caused many species to increase their nighttime activity by about 20 percent.
Results were published Thursday in the journal Science.