Telstra has revealed the addition of almost one million new mobile services in the six months to December 2011, but Sensis revenues plummeted 24 percent in 12 months.
A small winged dinosaur called Microraptor gui may well have been nature's predecessor of the famous flight of Wilbur and Orville Wright at Kitty Hawk in 1903. Microraptor gui, which weighed just 1kg may have had a pair of wings arranged in a way that resembled the Wright brothers' biplane that achieved the first recorded heavier than air powered flight.
According to a six-page paper penned by
Professor Sankar Chatterjee, a paleontologist at Texas Tech University,
presented this week in the online Proceedings of the National Academy
of Sciences, the wings of Microraptor could have resembled a staggered
biplane configuration during flight.
Professor Chatterjee writes that a computer simulation of the flight
performance of Microraptor suggests that its biplane wings were adapted
for gliding between trees, where the horizontal feathered tail offered
additional lift and stability and controlled pitch. Like the Wright
1903 Flyer, Microraptor, a gliding relative of early birds, took to the
air with two sets of wings.
According to Professor Chatterjee, the evolution of powered flight in
birds from theropod dinosaurs is recognized as the key adaptive
breakthrough that contributed to the biological success of this group.
"The transformation of wing design from nonavian dinosaurs to early
birds is beginning to unravel in recent times from a wealth of fossil
record from China. Hundreds of small, exquisitely preserved, feathered
theropods were discovered in the Early Cretaceous Jehol Group of
northeastern China as they died some 125 million years ago, smothered
in the 'Cretaceous Pompeii'," Professor Chatterjee says in his paper.
David Bass
| ComOps, a leading Australian provider of business software products and services, has won a competitive tender to deploy its Salvus safety, r…
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