If you thought you new a lot about animal behavior, the following unbelievable but true animal facts may cause your jaw to drop.

如果你觉得你对动物行为一无所知，那下面这些难以置信却真实的动物真相可能会让你惊到下巴都掉下来。

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Drop your jaw which will cause your mouth to open.

放松你的下颚让你的嘴巴打开。

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An absolutely fabulous test. As I mentioned on my blog, two of the puzzles made my jaw drop to the floor with how well constructed and interesting they were.

非常出色的题目，像我在博客里提到的，有两道题目构思巧妙很有意思，让我惊到下巴掉到地板上。

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And if anyone actually ever paid them, their jaw would drop open because they don't expect to get that at all.

NPR: 6 min 38 sec

The jaw-drop reactions won't come as a surprise to the show's executive producer Tom Forman either: "I think we'll get some tune-in based on the 'Oh, my gosh, I can't believe they're doing that' factor, " he said.

FORBES: Kiddy Up