There never was any evidence they were scavengers and numerous fossil examples that T. Rex did infact hunt large herbivores for food. The most notable being a T. Rex's tooth found in a hadrosaur's spine, and the wound showed signs of healing meaning the hadrosaur was alive when it was bit and survived the encounter.

"We not only have a broken-off tooth embedded in the bone of another animal, but the bone has healed over the wound, and a nasty wound it was too," said David Burnham at Palm Beach Museum of Natural History in Florida. https://www.theguardian.com/science/2013/jul/15/t-rex-tooth-embedded-prey-dinosaur

Other evidence includes fossilized footprints suggesting a group of T. Rex of differing ages stalking their prey. This isn't to say the T. Rex wouldn't take advantage of a dead animal and opportunistically scavenge, as any large predator will today, but this probably wasn't their primary means of getting food.

[–] festemmie@lemmy.world 5 points 1 year ago

and also there is no evidence of feathers, but it is very probable they had some, like just small filaments on top of their heads and necks or something similar. There are some Trex skin impressions, but theyre all on parts where there wouldnt be feathers anyway

[–] some_guy@lemmy.sdf.org 3 points 1 year ago

That's all very interesting, but I can't get past the socks with sandals. T-Rex is dead to me.