Hello, I was reading about Archimedes' Principle on the wiki ( https://en.wikipedia.org/wiki/Archimedes'_principle ) and a question popped up regarding the upthrusting force (also called buoyant force) that the liquid exerts on an object that is in the liquid. I understand that the upthrusting force is equal to the mass of the displaced liquid caused by the object in it. This force is exerted by the liquid right beneath the object. However, I was wondering what exactly causes this upthrusting force. I first thought that as soon as the object falls in the liquid, it compresses the liquid beneath it and thus increasing the pressure of that liquid beneath which results in a force upwards against the object. In reality however, the object actually pushes the liquid on the sides and the liquid rises in height. This means that the object isn't actually compressing the liquid beneath it (but just pushing the excess away), thus there shouldn't be an increase in pressure in the liquid beneath the object (the same amount of molecules is there). If that's so, then where does this upthrusting force come from other than pressure?