Originally posted by: HearMeRoar
No age is explicitly mentioned in MBh except Drona's. Not Krishna's, not Bheeshma's.
If Bheeshma fought like he did in Kurukshetra, there are only 2 possibilities: 1. It was magic/related to divinity ie, faith. Which is entirely acceptable, but it cannot be taken as science. 2. He was not 100+
Being 100+ isn't difficult for one having Iccha Mrityu vardaan.
If we take as science many things would not be possible