Explaining affordability through the math of compounding
Ethan used a quote wrongly attributed to Einstein as the starting point for an article about compound interest and rising prices.
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Ethan Siegel
Astrophysicist, author, and the voice behind Starts With A Bang!, sharing what we know about the Universe through articles, books, and conversations with scientists.
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Ethan’s happenings, collected from public sources, plus his backstory and Starbook, where fans write.
bigthink.comRead on Big ThinkA closer look at Rubin Observatory’s dwarf planet discovery
His latest Solar System explainer put the discovery of 2026 ED138 in context and explored why the label “sixth dwarf planet” can be misleading.
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Ask Ethan takes on respected theories that fall short
Ethan answered a reader’s question about what scientists should do when an established theory fails to explain the evidence.
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Revisiting the people behind dark matter’s discovery
He traced the contributions of Fritz Zwicky and Vera Rubin to the evidence for dark matter.
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Mapping the limits of cosmic exploration
Ethan explained how the expanding Universe sets different boundaries for what we can observe, reach, or communicate with.
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