Jonathan O'Callaghan
Contributor
Jonathan O’Callaghan is a freelance space and science journalist based in the UK, regularly writing and reporting for a number of publications around the world. He specialises in covering commercial spaceflight, space exploration, and astrophysics, but also reports across a wide range of science, from CRISPR to climate change.
Latest articles by Jonathan O'Callaghan
![Graphic showing three people riding camels under a starlit sky with one very bright star.](https://cdn.mos.cms.futurecdn.net/tsVrRTBgh44qqdiLFsNjBd-320-80.jpg)
What was the Star of Bethlehem?
By Jonathan O'Callaghan last updated
Reference The Star of Bethlehem led the three wise men to Jesus' birth, according to the New Testament. But what was the Star of Bethlehem? There are several theories.
![an abstract view of a wormhole with a clock overlaid](https://cdn.mos.cms.futurecdn.net/9meMCxtJU3NWkh5YcPs7qG-320-80.jpg)
What is time?
By Jonathan O'Callaghan, How It Works magazine last updated
Here's how time works, according to science.
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