Virginia opossum (Didelphis virginiana)
This is a marsupial, yes, just like the kangaroos, and yes, they also carry their young inside a little bag in their belly. But, when the young grow up and they don't fit anymore in it, they use their mom as a bus to take rides,
so they can worry about more important things... Like don't fall down!
Fun fact
There is a legend from the mazatecan culture. When humans didn't have the fire, they cold were cold during nights and winters. One day some fire came off from a star and an old lady took it and kept it for herself, when people
knew about it, begged her to give them some fire, but she refused. So, a nice opossum offered people to bring them fire if humans promissed to stoped huntign opossums. Humans just laughed at it, but opossum went to the old
lady's house and asked her to let him to get close to the fire because it was very cold, and she agreed. When opossum was close enough, put its tail in the fire and ran away to the humans keeping its word of giving them the
fire. That's why its tail has no hair.