What is both possible and impossible at the same time?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

Four cars come to a four-way stop, each coming from a different direction. They can’t decide who got there first, so they all go forward at the same time. All 4 cars go, but none crash into each other. How is this possible?

What has no start, end, or centre?

Rebus Puzzle Definition: A rebus is an illusion device that uses pictures to represent words or parts of words.
What does This Rebus Puzzle Identify?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

What has a ring but no finger?

I know a nine-letter word having only one vowel.
Do you ?

I look at you, you look at me, I raise my right, you raise your left. What am I?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?