Even for grasshoppers, being upside-down can be a high (blood) pressure situation. Colleen Prieto / flickr CC BY-NC-ND 2.0 When push comes to shove, we humans are just giant sacks of fluid. Weighed ...
How do insects control the effects of gravity when they climb a tree or hang upside-down waiting for prey? They don't have closed circulatory systems that restrict fluid flow to certain parts of the ...