A mature river, since the water is cold, normally travels around 10-25mph.
Mature rivers - Travel slowly Young rivers - Travel fast Old rivers - Travel VeRy SlOwLy Apex :D
Downhill.
the rivers make it difficult to travel across europe
it was easier to travel upstream
Mississippi
it is easier to travel on water.
Please rephrase - the question is unclear.
yes.
yes.
Uhm... Travel?
it made it easier to travel against the current
it made it easier to travel against the current