One sleepy person can start a bout of contagious yawning that quickly spreads through a room. But a new study suggests the effect may not be limited to the room’s human inhabitants: Dogs can “catch” yawns from people, the study found—especially their owners, hinting that pooches may empathize with familiar people.
When listening to recordings of people yawning, 12 of the 29 dogs in the study yawned themselves. It made a big difference, however, whom they heard: The dogs yawned more than four times as much when they heard their owner yawn as when they heard as a stranger.
What’s the News: Chimpanzees, like people, can “catch” yawns from others. But not all yawns are created equal, it seems; chimps are more likely to catch yawns from a chimp they know than from a stranger, a new study found. (You can see a video of it here.) This supports the idea that it’s empathy—rather than just everybody needing a nap—that makes yawns contagious.