Polynesian people managed to seed much of the Pacific with little more than the technology of 'ancient man'. Just because the Aborigines haven't had need for boats for a long long time doesn't mean they never used them. And yet you don't know the mainstream models of gravity. So you have spent all that time avoiding learning Newtonian gravity, vector calculus and relativity. I started reading pop science books on relativity when I was about 15 or 16. I'd read pretty much the entirety of the pop science section in my local WHSmiths by the time I applied to university. You obviously haven't put much effort into learning physics.