seawater

Scientists say subtle differences in the colour of seawater will enable them to count tiny - but critically important - Antarctic marine creatures from Space.

"The wind hit the car and seawater started gushing through in front of me," he said.

That area is part of a vast swathe of seafloor that is covered with the naturally occurring metal nodules, which form when dissolved metals in seawater collect on fragments of shell - or other debris.

The sponge was tested in four aqueous environments: irrigation water, pond water, lake water and seawater.

This type of flooding - from rivers bursting their banks or storm surges bringing seawater onto shore - can be particularly damaging as it often brings deeper floodwaters.