"The most devastating evidence against wormhole travel comes from the laws of physics. In short, any physical object would be destroyed beyond recognition by the intense gravitational forces in the vicinity of a wormhole. An unlucky alien approaching one would be stretched into a long line of particles several miles long. As this alien gets sucked down toward one of the singularities, even the particles would disintegrate. The alien would end up as an extremely compressed ball of chaotic energy." (Hugh Ross)
Black Holes, Singularities, and Wormholes