The Mystery of Gravity: Information in the Cloud
What if gravity and the electromagnetic force (EM) were actually one and the same thing? Gravity is said to be always attractive,  but how do we know that? After all, we do not know of any massive object that would be negatively or positively charged. If, starting from a certain size, all objects become electrically neutral, then they will always fall under what we call gravity.
Take hot and cold air. It is funny how the explanations, at least on the Internet, all make beautiful Aristotelian sense: hot air rises because it has less density, while cold air has more density. More density means more weight, and therefore cold air falls down, pushing hot air up.
But didn't gravity work the same for all objects, irrespective of their masses? So there is no reason for cold air to fall any faster that hot air. Also, if you throw a load full of heavy objects on lighter objects, the latter will just get buried under the heavier ones.
But then, we have the example of water where less dense objects float while denser one sink. The principle of buoyancy would seem to apply not only to water but also to air.
Also, our every day experiences do suggest such an explanation. After all, boiling water produces steam which definitely floats in the air, and only falls back down once it has cooled enough.
All in all, this does not seem to have to do much with gravity. Except of course that all these processes are allowed by gravity.
Buoyancy seems to be a force on its own, opposite to gravity, of which it can also apparently easily win. Which is a good thing since otherwise birds would not be able to fly and we wouldn't have planes. That does not mean that these familiar processes do not need a more elaborate explanation.
Why buoyancy? Pressure is not an explanation but the description, however abstract, of what we can experience directly: less dense objects tend to float in the air or water, and heavier ones to sink to the ground. By calling this phenomenon by its own name, pressure, we indicate that it has to be distinguished from gravity.
It would be of course very difficult to claim that less dense objects become somehow electrically charged, and are therefore repelled by the mass of the earth. On the other hand, it would help us get rid of a very annoying concept for which we cannot seem to find an acceptable explanation. Equating gravity with the EM force would be a very welcome solution to many problems. As it would, I am sure, create many others.
The meaning of these lines lies not in the validity of the claim, but in the possibility of an alternative explanation. We do not necessarily have to consider gravity as distinct from EM. Maybe it is just a matter of the right definition of both forces.