Animal Planet

[lswot]

Re "Elephants communicate...... Oh really?"

Sure. First they arrange a meeting place, then they pack their trunks for the trip.

Then they all go to the Elephant Bar and tip a few.

[Henry J]

Dinosaur Fossil Bone Leads to Gender, Age Determinations

Paleontologists at North Carolina State University have determined that a 68 million year-old Tyrannosaurus Rex fossil from Montana is that of a young female, and that she was producing eggs when she died.

[brian]

she was producing eggs when she died.

How embarrassing.

Almost as bad as the way Elvis died.

[brian]

Via CNN.com...

WASHINGTON (AP) -- A group of dolphins living off the coast of Australia apparently teach their offspring to protect their snouts with sponges while foraging for food in the sea floor.

Researchers say it appears to be a cultural behavior passed on from mother to daughter, a first for animals of this type, although such learning has been seen in other species.

The dolphins, living in Shark Bay, Western Australia, use conically shaped whole sponges that they tear off the bottom, said Michael Kruetzen, lead author of a report on the dolphins in Tuesday's issue of Proceedings of the National Academy of Science.

"Cultural evolution, including tool use, is not only found in humans and our closest relatives, the primates, but also in animals that are evolutionally quite distant from us. This convergent evolution is what is so fascinating," said Kruetzen.

Researchers suspect the sponges help the foraging dolphins avoid getting stung by stonefish and other critters that hide in the sandy sea bottom, just as a gardener might wear gloves to protect the hands.

Kruetzen and colleagues analyzed 13 "spongers" and 172 "non-spongers" and concluded that the practice seems to be passed along family lines, primarily from mothers to daughters.

"Teaching requires close observation by the pupil," Kruetzen said. "Offspring spend up to four years before they are weaned, so they would have ample time to observe their mum doing it -- if she is a sponger."

"This study provides convincing evidence that the behavior is transmitted via social learning," commented Laela Sayigh of the University of North Carolina Center for Marine Science.

"Such social learning appears to be widespread among the Shark Bay dolphins," said Sayigh, who was not part of Kruetzen's team.

Only one male was observed using a sponge. Kruetzen noted that, as adults, male and female dolphins have very different lifestyles.

Adult males form small groups of two or three individuals that chase females in reproductive condition, he explained. "I would think that they do not have time to engage in such a time-consuming foraging activity as adults, as they are busy herding females."

Currently at the University of Zurich, Switzerland, Kruetzen was at the University of New South Wales, Australia, when the research was conducted. The work was funded by the Australian Research Council, the National Geographic Society, the W.V. Scott Foundation and the Linnaean Society of New South Wales.

[Henry J]

Re ""Cultural evolution, including tool use, is not only found in humans and our closest relatives, the primates, but also in animals that are evolutionally quite distant from us. This convergent evolution is what is so fascinating," said Kruetzen. "

I wouldn't call that convergent evolution unless the brains in the two types do stuff in the same way, a way different from that of their closer relatives. (Unless I'm being too nitpicky?)

Henry

[lswot]

I wouldn't call that convergent evolution unless the brains in the two types do stuff in the same way, a way different from that of their closer relatives. (Unless I'm being too nitpicky?)

YOU? Naaaaaaaa

[Henry J]

I resemble that remark!

[Henry J]

Australian geckos show surprising strengths

Usually when you give up something, there’s a price to pay. Not so in the case of the Australian Bynoe’s gecko. This line of all-female geckos doesn’t need sex or a male to reproduce and, contrary to expectations, these “Wonder Woman” geckos can run farther and faster than their sexually reproducing relatives.

(Wonder lizard?)

[lswot]

Australian geckos show surprising strengths

Usually when you give up something, there’s a price to pay. Not so in the case of the Australian Bynoe’s gecko. This line of all-female geckos doesn’t need sex or a male to reproduce and, contrary to expectations, these “Wonder Woman” geckos can run farther and faster than their sexually reproducing relatives.

(Wonder lizard?)

Way to go, gecko's? Does Geiko know about this? That guy that does the commercials may have second thoughts.

[Henry J]

Trees, vines and nets - Microbial evolution changes its face

EBI researchers have changed our view of 4 billion years of microbial evolution. Christos Ouzounis and colleagues have gained intriguing quantitative insights into how gene families are transferred, not only 'vertically' through passage from one organism to its progeny, but also 'horizontally' through the exchange of genetic material between distantly related organisms.

Like the tree thing wasn't confusing enough by itself???? Ack!

Henry

[lswot]

Trees, vines and nets - Microbial evolution changes its face

EBI researchers have changed our view of 4 billion years of microbial evolution. Christos Ouzounis and colleagues have gained intriguing quantitative insights into how gene families are transferred, not only 'vertically' through passage from one organism to its progeny, but also 'horizontally' through the exchange of genetic material between distantly related organisms.

Like the tree thing wasn't confusing enough by itself???? Ack!

Henry

Well, there go my theories.

[Henry J]

Yeah? Where'd they go?

[lswot]

Yeah? Where'd they go?

To a galaxy far, far away!

[Henry J]

Further than the Delta quadrant?

[lswot]

Further than the Delta quadrant?

Well, no.....the might get in the way.