Uploaded July 2026 | Updated September 2026, 2 weeks ago
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About 25 years ago, astrophysicists noticed that the universe’s expansion is accelerating. To account for this observation, physicists came up with a new type of energy – called dark energy – which supposedly makes up more than 75% of the universe, and also has negative pressure. In a new paper, mathematicians claim that dark energy isn’t needed to explain that accelerating expansion, and physicists have been barking up the wrong tree for decades. Let’s take a look.
Paper: doi.org/10.1098/rspa.2025.0912
#science #physics #universe #cosmos #sciencenews
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Did physicists make a mistake with dark energy? See why new math suggests we might not need this theory to explain universe expansion.
This video explores a recent claim by a group of mathematicians challenging the foundation of dark energy. If their calculations hold up, it would signal a major shift in modern astrophysics. We break down the original observations from 25 years ago that suggested the universe expansion is accelerating and compare them against these new mathematical findings.
🌎 Get an exclusive 15% discount on Saily data plans! Use the code SABINE at checkout. Download the Saily app or go to: saily.com/sabine ⛵
About 25 years ago, astrophysicists noticed that the universe’s expansion is accelerating. To account for this observation, physicists came up with a new type of energy – called dark energy – which supposedly makes up more than 75% of the universe, and also has negative pressure. In a new paper, mathematicians claim that dark energy isn’t needed to explain that accelerating expansion, and physicists have been barking up the wrong tree for decades. Let’s take a look.
Paper: doi.org/10.1098/rspa.2025.0912
#science #physics #universe #cosmos #sciencenews
👕T-shirts, mugs, posters and more: ➜ sabines-store.dashery.com
💌 Support me on Donorbox ➜ donorbox.org/swtg
👉 Transcript with links to references on Patreon ➜ patreon.com/Sabine
📝 Transcripts and written news on Substack ➜ sciencewtg.substack.com
📩 Free weekly science newsletter ➜ sabinehossenfelder.com/newsletter
👂 Audio only podcast ➜ open.spotify.com/show/0MkNfXlKnMPEUMEeKQYmYC
🔗 Join this channel to get access to perks ➜
youtube.com/channel/UC1yNl2E66ZzKApQdRuTQ4tw/join
📚 Buy my book ➜ amzn.to/3HSAWJW
Did physicists make a mistake with dark energy? See why new math suggests we might not need this theory to explain universe expansion.
This video explores a recent claim by a group of mathematicians challenging the foundation of dark energy. If their calculations hold up, it would signal a major shift in modern astrophysics. We break down the original observations from 25 years ago that suggested the universe expansion is accelerating and compare them against these new mathematical findings.
