Hello, hello, curious crew. I'm Dr. Samantha Amin, also known as Science Sam, your new host for Curiosity Weekly from Discovery.

I am thrilled we'll be learning together every week. I'm a neuroscientist by training, and I've spent the better part of the last decade being completely obsessed with cells.

So I'm really excited about today's episode.

But don't worry, together on Curiosity Weekly,

we're going to explore all different areas of science.

Like today, we're also going to space.

This season, we have a little more time to dig beyond the headlines

of the latest scientific discoveries and talk to experts.

All to understand this fascinating world we live in.

Oh, and of course we'll cover things out of this world too, speaking of.

Mars is a planet that was once a very different place than it is today.

It had rivers and lakes and possibly oceans and a much thicker atmosphere.

Like if you were to pour out a glass of water on Mars today, it would just boil away immediately

because the pressure is so low that it's just not stable.

So there must have been a lot more atmospheric pressure in the past on Mars for the water to have existed.

So where did all that atmosphere go?

That's Dr. Robert Lillis, a planetary scientist and head of NASA's Escapade mission.

They're using twin spacecraft buds to study the atmosphere on Mars.

This will help us prepare for future space travel to the red planet

and give us answers to big questions about our own planet Earth.

And then we'll learn about a new idea to make growing crops more efficient

and bypass photosynthesis.

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