They can ! At least many of my snakes can anyway - you'd be surprised where they can get under, into and around !
Snakes curl up when they are sleeping and resting. Snakes may also begin to curl before an attack. It is best to stay away from a snake if you are not sure what the behavior is.
They curl themselves up in order to stay warm.
to reduce heat loss
The teeth curl backwards to prevent struggling prey from escaping.
Most snakes curl up when they sleep, but not all snakes. Some snakes are arboreal, which means they live in trees. They curl up on a branch to go to sleep. Most other snakes, such as ball pythons, king snakes, and rat snakes seem to like a hiding place when they rest and you will often find them curled up under a rock or log or other out of the way place. However, there are certain very large snakes (think anacondas or Burmese pythons) that just seem to lay straight out in a line. Although I am not certain, I think you would find that these snakes don't have many natural predators so they don't need to hide themselves. Even these huge snakes will try to go to an out of the way place after they have eaten a huge meal, since they are vulnerable for a couple of days right after they have eaten.
fingernails shouls not curl under or it just depends on how you would like your nails
how would i know, i'm not a hair stylist
A few possible answers: Armadillo Millipede Snakes
Abdominal muscles
You wait for a wave to come and ride under it
Snakes curl up when they are sleeping and resting. Snakes may also begin to curl before an attack. It is best to stay away from a snake if you are not sure what the behavior is.
It takes 89% of your brain to curl your finger and 10% to ask this kind of questions.