The cosmic background radiation - in the microwave part of the electromagnetic spectrum.
In the 1960's scientists uncovered new evidence that seemed to support Wegener's theory.
Fossils.
When the theory of plate tectonics was first published in the early 1900s, it was dismissed by main stream scientists as being ridiculous - because many if not most of those scientists believed in the "steady state" of the Earth theory - things don't change or change very little. Today, the theory of plate tectonics has been supported by scientific study and discovery, beginning in the 1950s - and the vast majority of scientists today believe in it.
Continental drift.
The continuous expansion of the Universe, with all Galaxies receding from each other, is the foundation observation. The Big Bang is the computed start point when all lay together. And where physics as we know it is quite insufficient to probe.
Some people believe in that theory, but some people believe in Adam and Eve. Scientists claim that they have found evidence that we started from apes.
Similarities among embryos.
For their own benefits.
Alfred Wegener did not have the "HOW" factor- because of no evidence on the process, they could not believe his theory.
They rejected Wenger's theory for half a century because he didn't have the evidence to prove his theory No, He did have evidence to prove his theory, they just did not believe him- TheSystem because of their lack of knowledge of the Earth He actually had evidence, but it was actually because the hypothesis interferred with their own hypothesis about how mountains form.
Because the theory fits all the evidence so far. There are still difficulties with it and more questions need to be answered but it seems to be the best theory at present.
Scientists believe early modern humans originated in Africa. This theory is supported by fossil and genetic evidence that suggests humans evolved in Africa before migrating to other continents.
Of course they do. Scientists believe anything that they think is true.
modify the theory or discard it altogether.
It depends, because some might say 'scientists'. But not all scientists believe in this theory. Also, there are those who believe in a similar idea to the Big Bang, but it is not refered to as 'The Big Band Theory.'
me and your mom
Scientists had made observations that did not fit exactly with Dalton's theory. Scientists changed the atomic theory to include this new knowledge. While the modern atomic theory is based on Dalton's theory, it is also very different.