They are herd-oriented animals. As a cohesive group they feel safer when they eat and sleep together. This way one animal that is more alert than the others can be awake to sense any sort of danger that may approach their resting area.
Yes.
Hours at a time, they sleep this way also.
Yes, to chew their cud.
General urban ledgend states that, when it is going to rain cows lie down.
Where do cows lie? On their UDDER side.
Elephants do not lie down and sleep. They sleep standing. You know why? They are afraid ants might get into their trunks
Yes, though they like to stand around and ruminate (chew their cud) for a while first before they lay down to take a nap.
No. Cows are not capable of lying like humans are, in the context of the ability to not tell the truth. All animals, except humans, never lie no matter what people think.
Cows only lay down when they are chewing their cud and resting after eating their fill. They don't lay down for any other reason, even when a storm or rain-shower is coming or happens. See the related question below for more.
Yes, a cow can go up stairs, although they find it too difficult to go down them :)
This is called lying down, cattle do not sit down as their bodies are not built to sit. They lie down as they are resting, cattle will only chew their cud when they are relaxed. They will also digest standing up as well.
The correct term is "lie down" when referring to resting or reclining on a surface. "Lay down" is used when placing something down. So, you would say "I am going to lie down on the couch to rest."