Earth Changes
Led by researchers from the Woods Hole Oceanographic Institution -- and equipped with unique robotic vehicles designed to explore mountain ranges miles beneath the polar ice cap -- 30 geophysicists, biologists, engineers, chemists, and other deep-sea specialists will depart July 1 from a remote Norwegian archipelago, Svalbard, aboard a powerful icebreaker that will smash a path to exploration sites near the geographic North Pole.
The Arctic, its mysteries concealed beneath thick ice, is the smallest but least known of the world's oceans.
"This is about exploring a portion of the earth that has been largely inaccessible to science," said Robert Reves-Sohn, a geophysicist from the institution who will be chief scientist on the 40-day voyage.
"We're looking for underseas habitats and creatures never seen before," he said during a news conference yesterday.
But, according to a paper published in this week's Science magazine, scientists have discovered that these floating ice islands--some as large as a dozen miles across--have a major impact on the ecology of the ocean around them, serving as "hotspots" for ocean life, with thriving communities of seabirds above and a web of phytoplankton, krill and fish below.
The icebergs hold trapped terrestrial material, which they release far out at sea as they melt. Scientists have discovered that this process produces a "halo effect" with significantly increased nutrients, chlorophyll and krill out to a radius of more than 3 kilometers (2 miles).
Based on their new understanding of the role of icebergs in the ecosystem and the sheer number of icebergs in the Southern Ocean--the researchers counted more than 11,000 in satellite images of some 4,300 square miles of ocean--the scientists estimate that, overall, the icebergs are raising the biological productivity of nearly 40 percent of Antarctica's Weddell Sea.
The baby manta, a female about 1.9m wide, was born last Saturday at the Okinawa Churaumi Aquarium, drawing worldwide attention.
But it was found dead early yesterday, according to Minoru Toda, a spokesman for the aquarium on the subtropical island of Okinawa.
"I have never seen such a thing but the father manta ray kept chasing the newborn baby from behind. The baby looked stunned and bumped into walls at times," Toda said.
The most significant records were broken across inland Queensland, where Boulia had a top of just nine degrees, its coldest day in 119 years of records. Richmond, in northwestern Queensland, reached just 13 degrees, its coldest June day in 115 years of records.
The quake, which hit northeastern Colombia and southwestern Venezuela, should not produce any significant damage because of its size and depth, Herbert Rendon, a Venezuelan seismological official said in a telephone interview.
Experts say the bursts are caused by underground pressure linked to torrents of mud gushing out of a drilling site near the industrial suburb of Sidoarjo in East Java for more than a year.
Heavy rains last week triggered landslides in the southern port city of Chittagong, burying at least 128 people alive.
Floods caused by days of torrential rain, described by weather officials as unusually heavy and devastating, inundated at least a dozen out of Bangladesh's 64 administrative districts.
Florida experts said wild dolphins are becoming more aggressive because boaters are feeding them.
"It seems reasonable to understand why you wouldn't feed a bear or something more dangerous-appearing, but these are wild animals," dolphin researcher Jason Allen said. "They are wild animals with lots of sharp teeth."