Did you know that some goats and sheep yell and scream just like people? This simultaneously funny and unsettling video, created by The Roosevelts, is a compilation of goat and sheep doing just that.

But why do they do it? Inquiring minds at Slate decided to find out:

Yelling, for goats, is not unusual. They will yell for all sorts of reasons. “Mother goats call for their young when they get separated,” explained goat specialist Dr. Daniel Waldron of Texas A&M, and “young kid goats also call for their mothers.” “Goats may also ‘yell’ when they expect to get fed,” continued Dr. Waldron. “If I feed one pen of goats, the second pen may start ‘yelling’ because they want to be fed right now.”

And why do they sound so much like humans? It’s a bit of a mystery, apparently. But the first thing to realize is that not all goats do sound like humans. Instead, they each have “distinctive voices,” Dr. Luginbuhl explained. While some individual goats may yell like humans, others have different voices and may not sound like humans at all.

Visit Slate to learn more about this hilariously weird phenomenon.

And then click here for Part 2 of “Goats Yelling Like Humans”.