![Um hey, Scientific American? Bird knees bend the same way as everyone else.Dr. Scott Hartman's Skeletal Drawing.com Um hey, Scientific American? Bird knees bend the same way as everyone else.Dr. Scott Hartman's Skeletal Drawing.com](https://images.squarespace-cdn.com/content/v1/51bf1cd3e4b0a897bf54112b/1371485566509-PFOTCA89UJSORRJZ2D4S/image-asset.png)
Um hey, Scientific American? Bird knees bend the same way as everyone else.Dr. Scott Hartman's Skeletal Drawing.com
![Dr Alex Evans on Twitter: "It may look like birds have backwards-facing knees, but in reality, their knees are close to the chest and often concealed by feathers. This makes it look Dr Alex Evans on Twitter: "It may look like birds have backwards-facing knees, but in reality, their knees are close to the chest and often concealed by feathers. This makes it look](https://pbs.twimg.com/media/DgtMPCNWsAAtfUa.jpg)
Dr Alex Evans on Twitter: "It may look like birds have backwards-facing knees, but in reality, their knees are close to the chest and often concealed by feathers. This makes it look
![Horrific moment fitness fanatic's leg bends backwards after pressing too much weight - Mirror Online Horrific moment fitness fanatic's leg bends backwards after pressing too much weight - Mirror Online](https://cdn.jwplayer.com/v2/media/VDcaaYJe/poster.jpg)
Horrific moment fitness fanatic's leg bends backwards after pressing too much weight - Mirror Online
![I have always had the ability to bend my legs backwards - so easily, in fact, that I sometimes do it without noticing. Most people seem to find it alarming. : r/pics I have always had the ability to bend my legs backwards - so easily, in fact, that I sometimes do it without noticing. Most people seem to find it alarming. : r/pics](https://external-preview.redd.it/EUTN63ZxNwwq78ySkOrstoCoIPPewTWuaJJF2R32-G8.jpg?auto=webp&s=e695660c08138945beb4047567bfb46570b716ed)
I have always had the ability to bend my legs backwards - so easily, in fact, that I sometimes do it without noticing. Most people seem to find it alarming. : r/pics
![Horrific moment fitness fanatic's leg bends backwards after pressing too much weight - Mirror Online Horrific moment fitness fanatic's leg bends backwards after pressing too much weight - Mirror Online](https://i2-prod.mirror.co.uk/incoming/article10105901.ece/ALTERNATES/s615b/Fitness-fanatics-leg-bends-backwards.jpg)
Horrific moment fitness fanatic's leg bends backwards after pressing too much weight - Mirror Online
![animation - IK Solver Won't Bend Knees Except Backwards -- Rolling Bones Not Helping, Constraints Not Helping - Blender Stack Exchange animation - IK Solver Won't Bend Knees Except Backwards -- Rolling Bones Not Helping, Constraints Not Helping - Blender Stack Exchange](https://i.imgur.com/3E09zTX.png)