Wednesday, December 21, 2005
Old Herbals are just fantastic, they contain so much interesting historical and medical information about plants. I particularly like 'The Herball' by John Gerarde. It has now been scanned and made available at the amazing Kurt Stüber's Online Library:
A new herbal, or historie of plants (1619) by Henry Lyte is also available:
It’s well worth browsing the online library which contains a huge variety of mostly science related books on everything from botany to geology and mycology. Particularly recommended is "Die Radiolarien Tafeln" and "Kunstformen der Natur" by Ernst Haeckel.
Sunday, December 11, 2005
Tawaraya Sotatsu (17th century died 1643) is in my opinion one of the great artists of the world and above is a small section of a folding screen produced by him. The image comes from the Tokyo national museum which is a shining example of providing worldwide access via the interent to high quality pictures of it's collection. Compared to the pathetic efforts of british museums it is amazing.
If you want to download a larger version of the above picture of get your hands on other pictures of the screen go to: http://www.tnm.go.jp/jp/gallery/material/film/index.html
and in the lowest section of the search form (フィルム番号 in japanese) there are two boxes with C in from of them. In the left hand box type: 0028941 and then press the search button (containing red text). That should take you to a results page and clicking the top link will take you to the above image.
If you want to search for the artist return to the search page and copy and paste this: 俵屋宗達
into the third box from the top (labelled 作者). The best images of the screen start at C28931.
needless to say Sotatsu is not the only artist in the collection try searching for:
ogata korin: 尾形光琳
Tosa mitsunobu: 土佐光信
Suzuki Kiitsu: 鈴木其一
Some Sotatsu links:
Thursday, December 08, 2005
The Dresden Codex
The Grolier Codex
The Madrid Codex
The Paris Codex
They are available to view online of download as PDFs which are up to 90 megs!
There are also Aztec and Mixtec codices available (mostly just as images online) see complete list: http://www.famsi.org/research/graz/
Sunday, December 04, 2005
- Evolution of cranial development and the role of neural crest: insights from amphibians
- Developmental studies of the lamprey and hierarchical evolutionary steps towards the acquisition of the jaw
- Reassessing the Dlx code: the genetic regulation of branchial arch skeletal pattern and development
- mechanisms facilitating the evolution of bills and quills
- Deer antlers: a zoological curiosity or the key to understanding organ regeneration in mammals?
"Schemae of gnathostome chondrocrania demonstrating the conservation of an ordered series of splanchnocranial elements in the gnathostome bauplan. Maxillary arch derivatives are depicted in yellow,mandibular arch in lavender and caudal arches in salmon and/or white. The neurocranial chondrocranium is in light blue. " from 'Reassessing the Dlx code', for full label see the original article.
Sunday, November 27, 2005
Refs: Spahni, R., J. Chappellaz, T.F. Stocker, L. Loulergue, G. Hausammann, K. Kawamura, J. Flückiger, J. Schwander, D. Raynaud, V. Masson-Delmotte, J. Jouzel, Atmospheric methane and nitrous oxide of the late Pleistocene from Antarctic ice cores, 310, Science, 1317-1321, 2005.
Siegenthaler, U. T.F. Stocker, E. Monnin, D. Lüthi, J. Schwander, B. Stauffer, D. Raynaud, J.-M. Barnola, H. Fischer, V. Masson-Delmotte, J. Jouzel, 2005, Stable carbon cycle-climate relationship during the late Pleistocene. Science 310, 1313-1317.
Saturday, November 05, 2005
Microbiologists raising doubts? It must be a cover-up
This story really does illustrate how dishonest tabloid reporting is here in the UK (guilty papers: Sun, Mirror, Mail, Evening Standard and more) Reporters seem to think it is OK to essentially fabricate evidence of MRSA contamination and then sling allegations of a 'cover-up' around when their dishonesty is exposed.
Other posts on this story:
After feeding the scare he’ll sell you the solution
The man behind the Mop of Death
Lab that finds bugs where others do not
"BrainMaps.org is an interactive high-resolution digital brain atlas and virtual microscope that is based on scanned images of serial sections of both primate and non-primate brains and that is fully integrated with a high-speed database server for querying and retrieving data about brain structure and function over the internet"
It is still in development so it should get even better in the future!
If you like brains, see also: The Brain Museum
Dmanisi in Georgia is a very important site in the understanding of human evolution so it is nice to see that a new paper on these finds is soon to be published in the journal of human evolution. The bones in this site are very well preserved so reveal alot of information about our ancestors. Dmanisi hominins are probably some of the earliest human ancestors to venture out of Africa - possibly due to greater intelligence enabling exploitation of new environments.
To get to Georgia the Dmanisi hominins must have travelled through Turkey - i wonder if there are more fossils of this age still to be found in this part of the world?
Anatomical descriptions, comparative studies and evolutionarysignificance of the hominin skulls from Dmanisi, Republic of Georgia
Philip Rightmire, David Lordkipanidze, Abesalom Vekua
Journal of human evolution - in press
Abstract: Evidence for ancient hominin occupation in Eurasia comes from Dmanisi in the Georgian Caucasus. Stratigraphic and sedimentological arguments,geochemical observations, paleomagnetic sampling and radiometric dates all point to the conclusion that bones and artifacts were depositedat this site during a brief interval following the close of the Olduvai Subchron (1.77 million years ago). In this report we presentfurther descriptive and comparative studies of the D2280 braincase, the D2282 partial cranium, now linked with the D211 mandible, and theskull D2700/D2735. The crania have capacities ranging from 600 cm3 to 775 cm3. Supraorbital tori and other vault superstructures are onlymoderately developed. The braincase is expanded laterally in the mastoid region, but the occiput is rounded. The pattern of sagittal keelingis distinctive. D2700 displays a prominent midfacial profile and has a very short nasoalveolar clivus. Also, the M3 crowns are reduced insize. Although there is variation probably related to growth status and sex dimorphism, it is appropriate to group the Dmanisi hominins together.With the possible exception of the large D2600 mandible, the individuals are sampled from one paleodeme. This population resembles Homohabilis in brain volume and some aspects of craniofacial morphology, but many of these features can be interpreted as symplesiomorphies. Otherdiscrete characters and measurements suggest that the Dmanisi skulls are best placed with H. erectus. There are numerous similarities to individualsfrom the Turkana Basin in Kenya, but a few features link Dmanisi to Sangiran in Java. Some traits expressed in the Dmanisi assemblageappear to be unique. Reconstructing the evolutionary relationships of these ancient populations of Africa and Eurasia is difficult, as the record isquite patchy, and determination of character polarities is not straightforward. Nevertheless, the evidence from anatomical analysis and measurementssupports the hypothesis that Dmanisi is close to the stem from which H. erectus evolved.
Some nice pictures of the excavation in progress and people involved: http://www.fas.harvard.edu/~skeleton/pontzerDmanisi.htm
Monday, October 31, 2005
Archaeoptics has just relased the news that they have finished scanning several rock art panels: Ketley Crag, Chatton Park 1, Huntersheugh Howgill and Cotherstone. This is good news as laser scanning is the most accurate and non destructive way of recording rock art and so will provide an excellent record of these carvings many of which are threatened in many different ways.
Beckensall Archive of Northumberland Rock Art
I have also come across a nice article on the scanning of the art at Long Meg: http://www.ucl.ac.uk/prehistoric/past/past50.html#LASERSCANNING
See also: Dr. Margarita Díaz-Andreu
Sunday, October 30, 2005
A Brief Introduction to Yucatec Maya
Combined Dictionary–Concordance of the Yucatecan Mayan Language
an online dictionary of all Mayan languages
Story about the film
Monday, October 24, 2005
Saturday, October 22, 2005
Sunday, October 16, 2005
I live near the lovely Wren's Nest national nature reserve so was very happy to learn (via discuss fossils) that a website with pictures of fossils collected there has been created by Geoff Broughton here:
It's well worth a look.
If you want to see the fossils in real life you can visit the Dudley Museum & Art Gallery, or the Lapworth Museum, or of course you could visit Wren's Nest itself. The picture is of the trilobite Calymene blumenbachii from Wren's Nest in the Dudley museum.
I have a set of photos taken at the Dudley museum on flickr here.
Tuesday, October 11, 2005
Above is an image from Morphbank a a cool new wesite I have just heard about via Eurekalert. It will apparently be an 'international Web database that contains thousands of high-resolution photographs and other images of plant and animal specimens.' The images here are all very high quality and it is possible to download vey high resolution versions which is nice, especially as there seem to be lots of nice SEMs, and i do like a nice SEM. The taxonomic coverage is limited at the moment (mainly to wasps) but it could be an amazing resource in the future.
The picture is the wasp Aylax papaveris and morphbank can be found at http://www.morphbank.com. Press release: http://www.eurekalert.org/pub_releases/2005-10/fsu-tso101105.php
Saturday, October 01, 2005
Krizek, B.A. and Fletcher, J.C. (2005) Molecular mechanism of flower development: An armchair guide. Nat. Rev. Genet. 6, 688-698.
An afternoon stroll through an English garden reveals the breathtaking beauty and enormous diversity of flowering plants. The extreme variation of flower morphologies, combined with the relative simplicity of floral structures and the wealth of floral mutants available, has made the flower an excellent model for studying developmental cell-fate specification, morphogenesis and tissue patterning. Recent molecular genetic studies have begun to reveal the transcriptional regulatory cascades that control early patterning events during flower formation, the dynamics of the gene-regulatory interactions, and the complex combinatorial mechanisms that create a distinct final floral architecture and form.
It is available to download from the Krizek lab homepage: http://www.biol.sc.edu/~krizek/0905NRG.pdf
Thursday, September 29, 2005
Above is a picture of the parasitic tapeworm Taenia crassiceps I thought i would post it becuase it is a neat picture. This parasite does look horrifying but there is some evidence to suggest that these and other parasites can be beneficial, manipulating the host immune response and preventing diseases such as asthma. Although a reduction in worm infection is probably not the only reason for the recent dramatic rise in asthma and other inflammatory diseases.
Microscopy and the helminth parasite http://dx.doi.org/10.1016/j.micron.2003.12.001 (source of image)
Parasite role reversal: worms on trial http://dx.doi.org/10.1016/j.pt.2005.02.002
Wheeze, allergic sensitization and geohelminth infection in Butajira, Ethiopia. doi:10.1111/j.1365-2222.2005.02181.x - evidence contra to the beneficial effect of worms?
Tuesday, September 27, 2005
Even though this bond is strong it seems that this ability is quite easy to breed. A Russian experiment with silver foxes has managed to domesticate them in around 30 generations merely by selecting those that showed the least fear of humans. This has lead to a number of other interesting changes including an increase in: ‘floppy ears’ ‘curly tails’ a white star on the forehead and short rolled tails. These traits are also common in domesticated dogs. This shows how easy it is to domesticate an animal, although I wonder what would happen in a non canid?
It is also interesting to speculate why dogs were domesticated in the first place. I am inclined to think it was something like dogs being useful to track or herd animals. But the stability of this relationship for 14,000 years is probably in large part due to the close relationship human and dogs have developed, based on the ability of our two species to communicate in a unique way.
Burying key evidence: the social bond between dogs and people
Morey. Journal of Archaeological Science. http://dx.doi.org/10.1016/j.jas.2005.07.009
People have been burying or otherwise ritually
disposing of dead dogs for a long time. They sometimes treat other animals in
such a fashion, but not nearly as often as dogs. This presentation documents the consistent and worldwide distribution of this practice over about the past 12,000e14,000 years. Such practices directly reflect the domestic relationship between people and dogs, and speak rather directly to the timing of canid domestication. In doing so, they contradict recent genetics-based inferences, thus calling into question the legitimacy of focusing mostly on genetic factors
as opposed to other factors. This discussion seeks to work towards a sound framework for analyzing and thus understanding the social compatibility between people and dogs. That compatibility is directly signified by the burial of dogs, with people often responding to the deaths of individual dogs much as they usually respond to the death of a family member. Moreover, that special social relationship continues, as illustrated clearly by the establishment, maintenance, and ongoing use of several modern dog cemeteries, in different countries of the world.
Early Canid Domestication: The Farm-Fox Experiment
Dogs respond appropriately to cues of humans' attentional focus
Saturday, September 24, 2005
An interesting new article is available from Naturwissenschaften reporting the discovery of eggs with dinosaur-like and bird-like characteristics. This is of course exactly what you would expect to find if birds had evolved from dinosaurs.
Minute theropod eggs and embryo from the Lower Cretaceous of Thailand and the dinosaur-bird transition
Eric Buffetaut, Gerald Grellet-Tinner, Varavudh Suteethorn, Gilles Cuny, Haiyan Tong, Adrijan Košir, Lionel Cavin, Suwanna Chitsing, Peter J. Griffiths, Jérôme Tabouelle1 and Jean Le Loeuff.
We report on very small fossil eggs from the Lower Cretaceous of Thailand, one of them containing a theropod embryo, which display a remarkable mosaic of characters. While the surficial ornamentation is typical of non-avian saurischian dinosaurs, the three-layered prismatic structure of the eggshell is currently known only in extant and fossil eggs associated with birds. These eggs, about the size of a goldfinch's, mirror at the reproductive level the retention of small body size that was paramount in the transition from non-avian theropods to birds. The egg-layer may have been a small feathered theropod similar to those recently found in China.
Link - journal website
Free full text: PDF