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The cosmic microwave background was first detected in the 1960s, gravitaional lensing was predicted by Einstein in the early 1900s and redshift can be traced ba
by Anon84 7y ago
The cosmic microwave background was first detected in the 1960s, gravitaional lensing was predicted by Einstein in the early 1900s and redshift can be traced back to the later half of the 1800s (as an extension of the Doppler effect)...
- leereeves 7y agoIt's not the existence of these phenomena that's unexplained, but specific observations that don't fit our current theories. This article seems like a decent introduction: https://medium.com/starts-with-a-bang/five-reasons-we-think-dark-matter-exists-a122bd606ba8 https://medium.com/starts-with-a-bang/five-reasons-we-think-...