I have a suspicion that if dinosaurs were magically brought back that we would discover that they tasted like delicious chicken and then hunt them to extinction. A 10 year-old girl with a 50 cal rifle could take out a T-Rex with ease.
Yep. A .416 Remington Mag will kill Godzilla or anything that every lived!
The 50 bmg would be overkill a 416 Rigby or Remy would do the job. T REX was effectively a flightless bird it’s hide and flesh would be no stronger than any other avian species they likely were feathered too. A good solid bullet the same used for elephant,hippo,buff or,rino would go completely through an animal of that size driven at 8000+ ft lbs of energy. The 50 bmg with 13,000+ which was designed to take out steel plated armor would blow holes in a poor T rex. The 50 is not even the largest caliber that a single human can shoot from the shoulder the 20mm is the next step up again doubling the ft lbs then there is the 23 mm technically pun intended not shoulder fired but still portable to the field. Poor Trex don’t stand a chance. There is nothing that has ever walked,swam,flown,or slithered that humans could not hunt to extinction with extreme prejudice we are the most effective killing species to ever live bar none.
http://www.anzioironworks.com/MAG-FED-20MM-RIFLE.htm
https://www.thefirearmblog.com/blog/2018/05/29/separatist-anti-material-rifle/