In fact, his table successfully predicted the existence of gallium and germanium, which were discovered later.

The theory of relativity, for example, predicted the existence of black holes long before there was evidence to support the idea.

Newton's theory was later used to predict the existence of another planet closer to the Sun than Mercury.

It predicts the existence of six quarks, of which only five have been found.

Its discovery in 1932 confirmed a theory predicting the existence of antimatter.

Before its discovery, astronomers had predicted the existence of a structure like this one.

Around the mid 1930's, scientists predicted the existence of dark matter for various reasons.

His most famous achievement was predicting the existence and position of Neptune, using only mathematics.

Despite criticism, he predicted the existence of large equal-mass binaries which were discovered in 2007.

He predicted the existence of the solar wind.