This is the Guardian. forgets who she is overnight. In Detroit a man is arrested but he was never at the crime scene.

In Spain disturbing pictures of young girls have appeared and no one knows who's behind them.

Something strange is happening.

A collision between people and artificial intelligence.

Discover more in the Guardian's new series Black Box.

Listen wherever you get your podcasts. New episodes, Monday and Thursdays.

It's been another busy week on the science desk here at the Guardian.

The James Webb Space Telescope brought us a glimpse of a possible water world

a mere 70 light years away.

A controversial new theory of gravity could get rid of the need for that elusive substance dark matter.

And the UK's science minister has apologized after posting false allegations about an academic on social media.

The science secretary falsely accused an academic, Professor Kate Tsang, of supporting Hamas.

These were comments that she was forced to retract in a statement

earlier this week. So today we're breaking down some of the biggest stories of the last seven days.

I'm the Guardian Science editor, Ian's sample and this is Science Weekly. I'm joined by Science Correspondent Hannah Devlin.

Hi, Hannah.

This week you reported on a really interesting theory

that could completely rule out the need for dark matter,

something scientists currently thinks makes up a hefty chunk of the universe.

So what is dark matter?

Well, I mean, in fact, we don't really know what it is.

Its actual nature is completely mysterious, but one of the strongest pieces of

...