Shark

Australia’s hybrid shark reveals evolution in action

Publication: msnbc.com   Date: January 3, 2012   View Article

Hybrid sharks have been discovered swimming in the waters off Australia’s east coast. The finding may be driven by climate change, a research team says, suggesting such discoveries could be more common in the future.

The hybridization is between the Australian black tip shark which favors tropical waters and the larger, common black tip shark, which favors sub-tropical and temperate waters.

Sharks Carrying Drug Resistant Bacterial Monsters

Publication: National Geographic News   Date: June 23, 2010   View Article

Our leftover medicines are spawning drug-resistant “bacterial monsters” that thrive inside sharks, scientists say.

The finding suggests antibiotics such as penicillin may be leaching into the environment and spurring drug-resistant bacteria to evolve and multiply in the oceans.

Photos: Ten Environmental Losses of 2009

Publication: National Geographic News   Date: December 15, 2009   View Article

2009 saw vast patches of the planet protected and world leaders pledge to fight global warming, but the climate continued to change dramatically–putting it in the “loss” column for the environment this year, according to experts who spoke to National Geographic.

Oldest Fossil Brain Found in “Bizarre” Prehistoric Fish

Publication: National Geographic News   Date: March 3, 2009   View Article

Digital x-ray images of a “bizarre” 300 million-year-old shark relative have revealed the oldest known fossilized brain, researchers announced yesterday.

The unusual discovery raises hopes that scientists will find other ancient brains and use them to study how gray matter has evolved, said John Maisey, a paleontologist at the American Museum of Natural History in New York.

NASA Tool Helps Track Whale Sharks, Polar Bears

Publication: National Geographic News   Date: August 25, 2008   View Article

Photos of giant whale sharks snapped by vacationing scuba divers and snorkelers are helping scientists track the elusive marine creatures across the oceans.

And the same technique may soon also help researchers track polar bears in Canada, giant Eurasian trout in Mongolia, and ocean sunfish in the Galápagos Islands.

“Walking” Sharks Among 50 New Species Found in Indonesia Reefs

Publication: National Geographic News   Date: September 18, 2006   View Article

More than 50 new species have been discovered off the coast of Indonesia, including small, slender-bodied sharks that “walk” with their fins along coral reefs, researchers announced today.

Shark-Shaped Submarine Is Latest Cousteau Star Vehicle

Publication: National Geographic News   Date: June 26, 2006   View Article

His name alone makes Fabien Cousteau, grandson of the late Jacques, a big fish in the world of underwater exploration. Now he’s taking that big-fish status to extremes.

The Paris-born, New York-based explorer had become a virtual shark, thanks to his new shark-shaped submarine. He uses the sub to dive incognito among the oceans’ top predators, great white sharks.

© 2008-2010 Collected Writings By John Roach