There is a video that has been doing the round for a few years of an MIT lecture that has become a topic of debate in another forum I am a member of.
The lecture by Prof Walter HG Lewin discusses Galileo's square cube law and then measures femur bones of mammals increasing in size. The mass of the bones do not scale up in the way predicted. The uploaded video presents the findings as disproving the law and also opening the possibility of giants.
Some have argued that; SC Law does not apply to bio mechanics and this lecture proves it. The MIT lecture has successfully debunked the law and proven it doesn't always hold. Elephants have proven to break the law as their bones have not scaled up the way that the SC law would predict. Therefore giants are possible as the SC law has been proven wrong, there is no upper limit to animal size.
Others argue: SC Law is pure math and not been been debunked. It applies to every three dimensional object, including in biology. Elephants do not "break" the SC law. Animal's bones are not expected to scale up perfectly with increasing animal size and this isn't relevant to the SC law. Saying otherwise is a false assumption. The SC law does not in itself disprove the possible existence of giants or give an upper limit to animal size, but when applying other aspects of bio mechanics problems arise which do indicate an upper limit to animal size
I would appreciate any thoughts on this, thank you.