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We already know that orangutans are some of the smartest land animals on Earth. Now, researchers have found evidence that these amazing apes can communicate about past events—the first time this trait has been observed in a non-human primate.

A new study published in the journal Science Advances revealed that when wild Sumatran orangutan mothers spotted a predator, they suppressed their alarm calls to others until the threat was no longer there.

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San Francisco's Treasure Island, where new developments are currently being built, is threatened by both sinking land and rising seas. Noah_Loverbear / Wikimedia Commons

According to a study released March 7, half of San Francisco International Airport's runways could sink underwater by 2100, The New York Times reported.

The study, published in Science Advances by Manoochehr Shirzaei of Arizona State University and Roland Bürgmann of the University of California, Berkeley, reveals that sea level rise poses more of a threat to the Bay Area than previously thought. The reason? A phenomenon known as subsidence, or land sinking.

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