Animals may have beaten upright plants to land.
The oldest fossils of footprints ever found on land hint that animals may have beaten plants out of the primordial seas. Lobster-sized, centipede-like animals made the prints wading out of the ocean and scuttling over sand dunes about 530 million years ago. Previous fossils indicated that animals didn’t take this step until 40 million years later.
“It’s staggering that we thought for all this time that animals appeared on land
Discarded human debris is encouraging colonization of exotic marine animals in the world`s oceans and threatening global biodiversity, particularly in the Southern Ocean. The findings, reported in this week`s NATURE, are based on a 10-year study of human litter (mostly plastic) washed ashore on 30 remote islands around the globe, from the Arctic to the Antarctic.
David Barnes of the British Antarctic Survey (BAS) found that man-made rubbish in the seas, especially plastics, has almost double
A European team of researchers has demonstrated that sediment is transported to the deep sea via canyons in the seabed. The sediment accumulates in the head of the submarine canyons. At the end of the canyons, mud avalanches disperse into the deep sea. Scientists from the Netherlands Institute for Sea Research (NIOZ) presented their findings at an international congress held from 7 to 10 April 2002.
With bottom landers, onboard the ship R.V. Pelagia, the researchers explored the Nazaré Canyo
Two cricket-like creatures establish new insect group.
The first new order of insects to be discovered for more than 80 years has emerged from the mountains of Namibia. The orders first official members are two creatures about 2 cm long that look a bit like a cross between a cricket and a stick insect 1 .
The group, called Mantophasmatodea, joins the other 30 or so insect orders such as beetles, flies and termites. “If it was in mammals itd be like
How do turtles survive long trips across the ocean? At the Society for Experimental Biology conference on Friday 12 April Ms Corinne Martin (University of Wales Swansea) will present evidence of energy-saving diving patterns adopted by green turtles to survive long ocean trips.
The turtles breed at Ascension Island, undertaking long-distance migrations greater than 2 300 km between the island and their feeding grounds on the Brazilian coast. During their trip across the ocean they don’t feed
Deserts covered Central Asia as early as 22 million years ago
The great Asian deserts developed 22 million years ago at the latest, 14 million years earlier than had been thought. So concludes a new analysis of Chinese soils, filling in another piece of the puzzle of the Himalayas’ birth.
Today, huge deserts characterize the vast landmasses inside Asia, the largest continent on Earth. Here, cut off by the Himalayas from the humidity of the Indian Ocean and far from any othe