The earth isn't a true oblate spheroid, hehe.
I have some discussion value, actually.
It involves Issac Asimov and evolution.
Some have asserted that, since science has been wrong before (say, about physics, like with Issac Newton), that science will continue to be wrong, and as such should not trust science when it shows that evolution exists and is happening right this second.
Tl;dr version, though I really do suggest watching the video, because it's fantastic: Issac refutes this with an analogy about the Earth being round. Science first thought that the Earth was flat. It then found that the Earth was round, so science was, strictly-speaking, 'wrong' at first. It was then found that the Earth was not truly round, but actually an oblate spheroid. Again, science was wrong, technically, but it was *less-wrong.* It was refined to be closer to the truth.
Later, it was found that the Earth as a whole wasn't actually an oblate spheroid, and that, by a very tiny amount, the Earth is wider in the bottom half than it is on the top half, making it very slightly pear-shaped. The science wasn't so much 'wrong' as it was 'incomplete,' and so while science may have some small errors in its understanding of evolution, we know enough now that there will almost-certainly never be something that overturns it, but simply refines it.