Take a close look at the column stone in the image. That's right, those are two grown men, one sitting on the stone and one standing next to it. The US army corps of engineers and one of its major contractors, Bechtel, have flatly stated that there is no modern technology, much less any ancient technology, which could move one of those stones a single inch. Only a recent attenuation in gravity itself provides any clue.To say that I'm skeptical of your theory is putting it mildly. You presumably mean that 2,000 years ago, gravity was some tiny fraction of its present amount.
Wouldn't this pretty dramatically mess up the orbits of the planets, among other small side-effects? All present celestial motion which we can observe is consistent with gravity being a constant throughout the observable universe. With obvious exceptions near black holes, etc.
To say that I'm skeptical of your theory is putting it mildly. You presumably mean that 2,000 years ago, gravity was some tiny fraction of its present amount? The stone in question is probably more like 4000 - 10,000 years old and Julius Caesar probably weighed about the same then as now but, yeah, that's the basic idea. Give you another example: in today's world, the biggest birds which can take off and land are albatrosses at around 30 lbs. and they can barely take off and land. Their takeoffs in fact are so problematical that sailors generally refer to them as "gooney birds". In all larger birds, the wings have become vestigial, and the birds no longer think of flying. In some recent past age however, the Argentinian teratorn flew; his wings were for sure not vestigial and nothing with wings like that could live other than by flying:
The teratorn, as you can see, was about 200 lbs, with a 25' wingspan; nothing like that could fly in our present world. The 8 - 25 million year thing which the article mentions is based mainly on uniformitarian assumptions.