Some of the evidence for continental drift was evident as soon as accurate maps of the South Atlantic coasts were available, which was in the 1800s. Abundant additional evidence was presented by Wegener and others in the early 20th century. Yet orthodox geologists continued to reject it, just as dogmatic Darwinists continue to reject anything which challenges their pet theory. Ruthlessly suppressing anything but an orthodoxy is not science! What should really be asked is why Darwinists are so obsessed with having their theory taught at the secondary or even elementary level. As a trained scientist, I know that knowledge of evolution is not necessary in most areas or science. One could even get along in geology without it, although one would have to keep one's ignorance hidden, and recognize that life did progress through geologic time. This doctrine is really being pushed, not so much because it is needed to succeed in life, but because of its absolute necessity to the determinist-materialist worldview which underlies socialism.
As a trained scientist, I know the evidence for ID is nil, and As a trained scientist, you should too.
Yes, you can speculate about ID, you can speculate about space aliens too, but teaching ID or that space aliens exists in school is stupid.
ID is not a challenge to evolution. At best it is a challenge to Creationism.