Category Animals

The last woolly mammoths on Earth had disastrous DNA

The last woolly mammoths on Earth were a sickly bunch. Dwarf woolly mammoths that lived on Siberia’s Wrangel Island until about 4,000 years ago were plagued by genetic problems, carrying DNA that increased their risk of diabetes, developmental defects and…

What if Earth were a super-Earth?

What would happen to life on Earth if the planet were supersized? For nearly four years, NASA’s Kepler spacecraft whisked through space, surveying our corner of the galaxy. It monitored more than 150,000 stars, looking for planets about the size…

Megalodon: Facts about the long-gone, giant shark

Earth’s largest known shark, Carcharocles megalodon, ruled the seas for more than 20 million years. The megalodon, which went extinct millions of years ago, was the largest shark ever to prowl the oceans and one of the largest fish on…

Why are these sharks doing the ‘pipi’ dance?

Twenty wriggling tawny sharks (Nebrius ferrugineus) were recently caught on video undulating on a beach on Mer Island, Australia. But why were the sharks shimmying in the sand? Though the sharks were gathered in shallow water, they weren’t stranded or…