Abstract: The biological ankle joint adjusts stiffness to adapt to changing walking speed and environments. However, commercial passive ankle-foot prostheses lack the ability to adjust stiffness, ...

Today, we notice Fin has taken a beating in the pond, so we net him out and move him into a clean, cycled tank where we can target-feed and help him heal. Then we check on Tyson, and it quickly turns ...

The praying mantis looks calm — until it moves. Its raptorial forelegs are spring-loaded weapons that snap shut in ...