Known to science only since 1968, it seems to have disappeared.

He looked up at the sky, which seemed to have disappeared for a second.

From then on the big machine seemed to have disappeared.

He's also been seen talking to a strange old woman who seems to have disappeared.

His heart seemed to have disappeared and left a hole.

What happened to the $180 billion of paper money that seems to have disappeared?

Politics and government seem to have disappeared from the screen.

The van also seemed to have disappeared about a week ago, they said.

They all seemed to have disappeared from his life a very long time ago.

And some of the parts were so small they seem to have disappeared.