World's lakes losing oxygen rapidly as planet warms

Oxygen levels in the world's temperate freshwater lakes are declining rapidly—faster than in the oceans—a trend driven largely by climate change that threatens freshwater biodiversity and drinking water quality.

Small 'snowflakes' in the sea play a big role

In the deep waters that underlie the productive zones of the ocean, there is a constant rain of organic material called "marine snow." Marine snow does not only look like real snow but also behaves similarly: Large flakes ...

Whales dive deep for profitable prey

An international research team has investigated why dolphins and whales perform record-breaking dives to several kilometers deep. For the first time they were able to match hunting behavior to the prey present in the hunting ...

How flashlight fish communicate with light signals in schools

Flashlight fish have the ability to generate situation-specific blink patterns resembling a visual Morse code. Researchers at Ruhr-Universität Bochum have shown in laboratory and field experiments that the animals use these ...

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