Descriptions of the future, as told by prehistoric time travelers upon their return to their respective eras:

 Le Moustier (France)

There were so many amazing things. In the future, they have large beasts called ‘airplanes’ that are armored in a shiny substance as hard as stone. They are as large as a female Mastodon during calving season.’

Minnesota Woman (Northern US): 

Minnesota Woman returned from the future, tucked a stray strand of hair behind her ear, and picked up a broom.  

‘The tribes are enormous. So many people... And don'tcha know? They have messy, thoughtless children in the future, too.’

Talgai (Australia):

‘It’s about the same as it is here.’

Cheddar Man and Hennewick Man (UK and US):

‘Cheddar man! You’re back! ’ Hennewick man hollered. ‘What did you see?’

Breathless, Cheddar man sat on a large stone and wiped his brow. 

‘OMG, Hennewick man. You would not believe what I saw. The people in the future sat in the belly of these huge red, round-legged creatures called ‘double decker busses’ that are as large as the gash between your mom’s legs.’

‘Fuck you, Cheddar man!’

Otzi (Italy):

‘The women are pale, hairless and a bit slutty’