Obviously they don't know who Scrooge McDuck is

the vibranium was from an meteorite. so if you're lucky enough to see one land, it's worth millions to scientists, as obtaining a sample from space costs a lot more. btw, meteorites are cold, not hot when they land

but friction and compression?

I dunno, maybe the freezing cold of high altitude?

the meteorites have been in cold space for millions of years, what breaks up on entry into the atmosphere burns off, but the core is still ice cold