ScienceFacts about our kneesTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoScience04/30/2015April 30, 2015The knee is the biggest joint in our body. Without our knees, we couldn't walk or sit down - not to mention jump. They withstand enormous strain every day. For brief moments, they can carry up to one and a half metric tons.https://p.dw.com/p/1FHp7Advertisement