Victoria Gill

And so what was the state of that mental health did you find?

And so what was the state of that mental health did you find?

And were there any countries that stood up for you that were worse off before or that had gotten worse or some which were doing better?

And were there any countries that stood up for you that were worse off before or that had gotten worse or some which were doing better?

We know that some of the countries that you are looking into, you just mentioned Mongolia, some of them will not be rich countries. They will not have enough resources. So what is the support system there to help those who've come or who've told you that there is, you know, they have anxiety, that they are a bit depressed?

We know that some of the countries that you are looking into, you just mentioned Mongolia, some of them will not be rich countries. They will not have enough resources. So what is the support system there to help those who've come or who've told you that there is, you know, they have anxiety, that they are a bit depressed?

The sheer number of these tiny beasts means that collectively they weigh an estimated 400 million tonnes. That is similar to the combined weight of every human on Earth. But they are difficult to monitor. They are small and the Southern Ocean is very big. They also move around in these swarms on the ocean currents.

The sheer number of these tiny beasts means that collectively they weigh an estimated 400 million tonnes. That is similar to the combined weight of every human on Earth. But they are difficult to monitor. They are small and the Southern Ocean is very big. They also move around in these swarms on the ocean currents.

So this latest mission developed by scientists from the charity WWF and the University of Strathclyde aims to measure them from space. Here's how. A team of scientists has already visited Antarctica on a research mission to catch live krill and then measure how their presence changes the amount of light that seawater absorbs. As you add krill to the water, its colour changes.

So this latest mission developed by scientists from the charity WWF and the University of Strathclyde aims to measure them from space. Here's how. A team of scientists has already visited Antarctica on a research mission to catch live krill and then measure how their presence changes the amount of light that seawater absorbs. As you add krill to the water, its colour changes.

And that, the researchers say, can be applied to satellite images of the ocean. There are, of course, already satellites capturing high resolution images of Antarctica. So while we won't be able to see individual krill in those pictures, what we could get, scientists say, are snapshots of their density at the surface of the ocean.

And that, the researchers say, can be applied to satellite images of the ocean. There are, of course, already satellites capturing high resolution images of Antarctica. So while we won't be able to see individual krill in those pictures, what we could get, scientists say, are snapshots of their density at the surface of the ocean.

And that could reveal some vital clues about the health of the Antarctic marine food chain. Victoria Gill.

And that could reveal some vital clues about the health of the Antarctic marine food chain. Victoria Gill.

The discovery that oxygen, which is vital for life, was being made in the dark on the seafloor confounded marine scientists when it was announced.

The discovery that oxygen, which is vital for life, was being made in the dark on the seafloor confounded marine scientists when it was announced.

The discovery that oxygen, which is vital for life, was being made in the dark on the seafloor confounded marine scientists when it was announced. It's widely accepted the gas is produced by plants in sunlight using photosynthesis. But down where sunlight can't penetrate... Scientists found oxygen levels going up.

The discovery that oxygen, which is vital for life, was being made in the dark on the seafloor confounded marine scientists when it was announced. It's widely accepted the gas is produced by plants in sunlight using photosynthesis. But down where sunlight can't penetrate... Scientists found oxygen levels going up.

The seabed they studied is covered with nodules of metal that have built up naturally over millions of years. It's these nodules that researchers say produce the gas. If they detect oxygen they'll then carry out detailed experiments to understand exactly how it's being made.

The seabed they studied is covered with nodules of metal that have built up naturally over millions of years. It's these nodules that researchers say produce the gas. If they detect oxygen they'll then carry out detailed experiments to understand exactly how it's being made.