Several fish species can change sex as needed. Other species adapt to their surroundings by living long lives — or by living shorter lives and having lots of offspring. The ability of animals and plants to change can sometimes manifest in apparently extreme ways.
People from NTNU travel around the world to do research. Photograph Per Harald Olsen has documented a number of these trips. He also has some advice for photographers who would like to take pictures like his.
Calanus finmarchicus makes up about 90 per cent of the bottom of the food chain in northern oceans, and is eaten by fish and baleen whales alike, but as the ocean becomes more acidic due to CO2 emissions, populations may decrease dramatically.
The endangered African wild dog is increasingly coming into conflict with humans, partly because it is difficult to fence them out. But an unusual approach may offer hope.
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