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.
Have you had sex and then regretted it or felt rejected? You aren’t alone, and nothing’s wrong with you, either.
Serengeti National Park is the symbol of Africa’s abundant wildlife. The park as we know it today could be history within a few decades.
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.