Alex Ritson

So, in some meadows challenged by higher temperatures, a small number of plants have been mutating or changing genomically.

By comparing the DNA of the variants with that of normal eelgrass, the team using Stephanie's data can now focus their attention on harvesting just the seeds that contain heat-resistant genes before replanting them in dying meadows.

It was this technique that Katie used to seed her new eelgrass meadows last year.

And to find out how those meadows were coming along, it was time to put on some weight.

This water is at zero degrees Celsius.

The eelgrass, what kind of depth does that normally grow in?

The water today is too murky to see the sprouting grass, but Katie hopes the meadow will not only have regrown, but will then also flourish in the hot temperatures of the summer.

If it does, the team are that bit closer to securing the future of eelgrass meadows in Maryland.

Professor Stephanie Camel ending that report from Ben Wyatt in Maryland.

And for more on that story, just search for People Fixing the World wherever you get your BBC podcasts.

Four years ago, NASA set out to determine whether it could deflect an asteroid if it was hurtling towards the Earth.

To do this, they smashed a spacecraft into Dimorphos, the moon of an asteroid called Didymos.

The good news is that fresh analysis of that mission, known as DART, has now shown that it is possible to change an asteroid's orbit.

Rakil Makadia, a planetary defence researcher at the University of Illinois at Urbana-Champaign, told us more about this unique experiment.

planetary defence researcher at the University of Illinois at Urbana-Champaign, Rahil Makadia.

Thank you.

Thank you.

of the Global News podcast was mixed by Joe McCartney and the producers were Mickey Bristow and Ira Khan.

The editor is Karen Martin.

I'm Alex Ritson.