The ocean depths are home to myriad species of microbes, mostly hard to see but including spaghetti-like bacteria that form whitish mats the size of Greece on the floor of the Pacific.
The survey, part of a 10-year Census of Marine Life, turned up hosts of unknown microbes, tiny zooplankton, crustaceans, worms, burrowers and larvae, some of them looking like extras in a science fiction movie and underpinning all life in the seas.
Science Glance
Three species of creature, which are only a millimetre long and resemble jellyfish encased in shells, were found 2.2 miles (3.5km) underwater on the ocean floor, 124 miles (200km) off the coast of Crete, in an area with almost no oxygen.
The remarkable remains of two ancient human-like creatures (hominids) have been found in South Africa. The fossils of a female adult and a juvenile male - perhaps mother and son - are just under two million years old.
A new species of giant lizard has been discovered in the Philippines. The 2m-long reptile is a monitor lizard, the group to which the world's longest and largest lizards belong.
The new species of hominid, the evolutionary branch of primates that includes humans, is to be revealed when the two-million-year-old skeleton of a child is unveiled this week.
Common toads appear to be able to sense an impending earthquake and will flee their colony days before the seismic activity strikes. The evidence comes from a population of toads which left their breeding colony three days before an earthquake that struck L'Aquila in Italy in 2009.
A team of scientists in Switzerland have collided sub-atomic particles at record power, in an attempt to mimic conditions of the Big Bang that created the universe 13.7 billion years ago.





























