Showing posts with label Natural History Museum. Show all posts
Showing posts with label Natural History Museum. Show all posts

Friday, February 10, 2012

Piltdown Man: British archaeology's greatest hoax

In a few weeks, a group of British researchers will enter the labyrinthine store of London's Natural History Museum and remove several dark-coloured pieces of primate skull and jawbone from a small metal cabinet. After a brief inspection, the team will wrap the items in protective foam and transport them to a number of laboratories across England. There the bones and teeth, which have rested in the museum for most of the last century, will be put through a sequence of highly sensitive tests using infra-red scanners, lasers and powerful spectroscopes to reveal each relic's precise chemical make-up.
The aim of the study, which will take weeks to complete, is simple. It has been set up to solve a mystery that has baffled researchers for 100 years: the identities of the perpetrators of the world's greatest scientific fraud, the Piltdown Hoax. Unearthed in a gravel pit at Piltdown in East Sussex and revealed to the outside world exactly a century ago, those shards of skull were part of a scientific scam that completely fooled leading palaeontologists. For decades they believed they were the remains of a million-year-old apeman, an individual who possessed a large brain but primitive jawbone and teeth.
The news of the Piltdown find, first released in late 1912, caused a sensation. The first Englishman had been uncovered and not only was he brainy, he was sporty. A sculpted elephant bone, found near the skull pieces and interpreted by scientists as being a ceremonial artefact, was jokingly claimed by many commentators to be an early cricket bat. The first Englishman with his own cricket bat – if nothing else it was one in the eye for French and German archaeologists whose discoveries of Cro-Magnons, Neanderthals and other early humans had been making headlines for several decades. Now England had a real fossil rival.
It was too good to be true. As decades passed, scientists in other countries uncovered more and more fossils of early apemen that differed markedly from Piltdown Man. "These had small skulls but relatively humanlike teeth – the opposite of Piltdown," says Professor Chris Stringer of the Natural History Museum, who is leading the new study. "But many British scientists did not take them seriously because of Piltdown. They dismissed these discoveries which we now know are genuine and important. It really damaged British science."
In the end, the Piltdown Man began to look so out of kilter with other fossil discoveries that a team led by geologist Kenneth Oakley, anatomist Wilfrid Le Gros Clark and anthropologist Joseph Weiner took a closer look and in 1953 announced that Piltdown's big braincase belonged to a modern human being while the jawbone came from an orangutan or chimpanzee. Each piece had been stained to look as if they were from the same skull while the teeth had been flattened with a metal file and the "cricket bat" carved with a knife. As Bournemouth University archaeologist Miles Russell puts it: "The earliest Englishman was nothing more than a cheap fraud." It had taken almost 40 years to find that out, however.

Wednesday, December 14, 2011

New dinosaur species found from museum vaults

Researchers have discovered what they say are the remains of a new horned dinosaur species which has been lying in the vaults of a British museum for nearly a century.


The remains of Spinops sternbergorum, which belongs to the same family as the Triceratops, were excavated from a quarry alongside a large group of fossils in a so-called “bone bed” in Alberta, Canada in 1916.

But the bones were described as “rubbish” by the Natural History Museum’s keeper of Geology at that time, and lay unnoticed for almost 100 years before experts realised they belonged to an undescribed species.

They were rediscovered by a current group of researchers who decided to take another look at the fossils and realised that they were unlike any others known to science.

Dr Andrew Farke, who led the research team, said: “I knew right away that these fossils were something unusual, and it was very exciting to learn about their convoluted history.

“Here we have not just one, but multiple individuals of the same species, so we are confident that it’s not just an odd example of a previously known species,” Dr Farke was quoted as saying a newspaper.

The find means that paleontologists will have to redefine how the horned dinosaur group, plant-eating dinosaurs sporting large horns and bony frills on their necks, are classified.

Dr Paul Barrett, the Natural History Museum’s resident researcher, said: “This discovery is of particular importance as it has implications on the way we use the spines that extend from the bony neck frill, which may have been used for identification between individuals, in our classifications of these animals.

“These embellishments are central to determining relationships between the groups of horned dinosaurs and are a sign of evolutionary relatedness.”

http://www.discoveryon.info/2011/12/new-dinosaur-species-found-from-museum-vaults.html?utm_source=feedburner&utm_medium=email&utm_campaign=Feed:+Discoveryon+%28Discoveryon%29

Friday, July 15, 2011

A rare he-she butterfly is born in London's NHM

A half-male, half-female butterfly has hatched at London's Natural History Museum.


A line down the insect's middle marks the division between its male side and its more colourful female side.

Failure of the butterfly's sex chromosomes to separate during fertilisation is behind this rare sexual chimera.

Once it has lived out its month-long life, the butterfly will join the museum's collection.

Only 0.01% of hatching butterflies are gynandromorphs; the technical term for these strange asymmetrical creatures.

"So you can understand why I was bouncing off of the walls when I learned that... [it] had emerged in the puparium," said butterfly enthusiast Luke Brown from London's Natural History Museum.

Mr Brown built his first butterfly house when he was seven, and has hatched out over 300 thousand butterflies; this is only his third gynandromorph.

Half and half
It is not only the wings that are affected, he explained. The butterfly's body is split in two, its sexual organs are half and half, and even its antennae are different lengths.

"It is a complete split; part-male, part-female... welded together inside," he told the BBC.

The dual-sex butterfly is an example of a Great Mormon, Papilio memnon - a species that is native to Asia.

With a shortage of butterfly-specific gender neutral pronouns, the butterfly is being referred to as "it", and is already middle-aged at three and a half week's old.

So the public has only a narrow window of opportunity to see it alive.

Though rare, gynandromorphy isn't unique to butterflies; individual crabs, lobsters, spiders and chickens have all been found with a mix of two sexes.

There are likely many more cases in the natural world, but sexual chimeras are more difficult to spot in animals where females and males look alike.



By Jennifer Carpenter

Science reporter, BBC News
http://www.bbc.co.uk/nature/14108204