Albert Einstein's mathematics profoundly changed physics. No one questions this. He is universally recognized as a mathematical titan, and though he might well have been an epochal physicist, it might be a mistake to call him a scientist.
Science is a body of knowledge acquired through observation. Einstein used his math to express his profound imagination, but instead of setting up experiments in order to observe his discoveries at work in the real world as would an empirical scientist, he chose instead to test his ideas with his well documented "thought experiments." The reason no one noticed this is probably the day and time that it was. Great minds in physics were all a-fever, trying to pry open the atom. What was inside? Waves? Particles?
In 1927, Niels Bohr came up with an "uncertainty principle" which said that the infinitesimally teensy atom was fundamentally unknowable from observation and could only be understood in terms of mathematics. Perhaps. Maybe this is the best we can ever do inside the atom, but what is derailed here is the observing of the need for palpable evidence in order to establish scientific discoveries. Meanwhile, since everything is made up of atoms, people found it easy to accept math in place of verifiable observations for a growing range of things needing an explanation.
So nobody questioned Einstein until NASA found his math to be worthless for sending instrument packages to the moon and to Mars and had to fall back on the four hundred year old math of Isaac Newton to get them there. And Newton was an actual scientist who went to observe the real world for verification. Remember the apple that thumped him on the head?
The Big Bang is not only the profound math which it happens to be, it is also magic. There may well be a whole football field's space surrounding the golf ball which represents the nucleus of a hydrogen atom, but the entire universe was never the size of the head of a pin. There never was a Big Bang and the universe is not expanding.
In all the years since Einstein's math created it, the only substantial evidence for an expanding universe is the red shift in the spectrum of light, the supposed Doppler effect from everything in the universe speeding away from us. Yeap. Red shift in all directions, which puts us in the exact center of the universe, for one thing, which is most suspicious in a universe so endlessly vast as ours. The other problem is that the Doppler effect is not the only possible way for light from the furthest reaches of space to arrive here, redder than it should be.
When light passes through anything such as glass, higher frequency shorter wavelengths get converted into longer wavelengths from collisions with atoms, causing a shift to the red end of the spectrum. Ultraviolet light coming into a greenhouse becomes heat. So, what do you suppose happens to light passing through all those zillions of miles of space from the most distant objects which we are able to see? Space is full of dust and stray atoms for light to collide with over its vast distances. Light will arrive redder than it started out, simply because of all the distance that it had to travel, without any need for everything we see in the heavens to be racing away from us.
So the Big Bang is nothing but Einstein's magic, is all I'm saying. And I ought to know, because Carol and I write about magic all the time.