# Beyond General Relativity

**URL:** https://boards.straightdope.com/t/beyond-general-relativity/1026015
**Category:** Factual Questions
**Tags:** science-math
**Created:** [December 24, 2025, 3:13am UTC](https://boards.straightdope.com/t/beyond-general-relativity/1026015 "2025-12-24T03:13:27Z")
**Posts on this page:** 1
**Showing post:** 8

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### Author: ![EnolaStraight](https://avatars.discourse-cdn.com/v4/letter/e/41988e/32.png) [@EnolaStraight](https://boards.straightdope.com/u/EnolaStraight)
#### Post date: [December 25, 2025, 3:16am UTC](https://boards.straightdope.com/t/beyond-general-relativity/1026015/8 "2025-12-25T03:16:38Z")

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> > [@Exapno\_Mapcase](#):
> >
> > In a [paper](https://www.nature.com/articles/s41586-023-06527-1) published today in _Nature_, the [ALPHA](https://home.web.cern.ch/science/experiments/alpha) collaboration at CERN’s Antimatter Factory shows that, within the precision of their experiment, atoms of antihydrogen – a positron orbiting an antiproton – fall to Earth in the same way as their matter equivalents.

> Looks like I finally have a definitive answer to an old question of mine.

> [antimatter - Factual Questions - Straight Dope Message Board](https://boards.straightdope.com/t/antimatter/58240/9)

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