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Saganism Profile picture
Saganism
@Saganismm
Astronomy, Physics, Philosophy & The Cosmos
Aug 19 • 6 tweets • 2 min read
In 1859, Charles Darwin shook the world with 'On the Origin of Species'. He proposed natural selection: species change over time, and traits that improve survival are passed on to offspring.

It was revolutionary but not fully proven in his time. 🧵1/6Image Darwin did not know about genetics. He observed patterns, fossils, and species variation but could not explain how traits were inherited. This gap led some to doubt evolution despite strong observational evidence. 🧵2/6 Image