There is no evidence that antigravity exists. In fact, it's an idea that goes against the laws of physics. The law of universal gravitation states that every particle of matter attracts every other particle of matter with a force proportional to the product of their masses and inversely proportional to the square of the distance between them. It's what makes objects fall to the ground.

Antigravity would be a force that would oppose the force of gravity. There is no known way to create such a force, and if it did exist, it would have a profound effect on our understanding of the universe.