Hey people centuries ago knows all the things...I mean regarding every subject,like science,geography,astronomy..........you can notice this from our grand and great grand parents...they do tell us some tricks through which we get out from diseases.............
One more example,if you know Ramayan,in that Ram and sita and all the people comes from Lanka to Ayodhya by Pushpak Viman.......it will have two wings....just like our present Aeroplane.............even now some diseases which are not curable by Allopathy can be cured by Ayurveda the ancient medicine.
Hope I didnot bored you and you got your answer