Saturday, April 17, 2010

April 6 - Amber yields secrets from dinosaur era‏

Dear Friends,

Jurassic Park anyone?

Be Well.


Amber yields secrets from dinosaur era

April 5, 2010
Courtesy of the American
Museum of Natural History
and World Science staff

A 95-million-year-old am­ber de­pos­it is adding new­found fun­gus, in­sects, spi­ders, nem­a­tode worms, and bac­te­ria to the por­trait of an an­cient ec­o­sys­tem al­so shared by di­no­saurs, sci­en­tists say.

Am­ber is hard­ened, fos­sil­ized tree sap whose glassy, jewel-like and yel­low­ish form of­ten con­tains small crea­tures trapped from the time of its or­i­gin and pre­served nearly per­fect­ly.

A chalcid wasp in Ethio­pian am­ber, 0.6 mil­li­me­ters long. (Cour­tesy U. of Vien­na)

The new­found de­pos­it, dat­ed to the Cre­ta­ceous era that was the last ma­jor pe­ri­od of the di­no­saurs, is re­ported to be the first ma­jor dis­cov­ery of its kind from Af­ri­ca.

The find­ing may al­so pro­vide in­sights in­to the rise and di­ver­sifica­t­ion of flow­er­ing plants dur­ing the Cre­ta­ceous, re­search­ers say. A re­port by 20 sci­en­tists on the dis­cov­ery, in the cur­rent is­sue of the re­search jour­nal Pro­ceed­ings of the Na­tional Acad­e­my of Sci­ences, re­con­structs an an­cient trop­i­cal for­est un­cov­ered in pre­s­ent-day Ethi­o­pia.

"Un­til now, we had discov­ered vir­tu­ally no Cre­ta­ceous am­ber sites from the south­ern hemi­sphere's Gond­wanan su­per­con­ti­nent, a land mass that in­clud­ed mod­ern Af­ri­ca, said re­search group mem­ber Paul Nascim­bene of the Amer­i­can Mu­se­um of Nat­u­ral His­to­ry in New York. "Sig­nif­i­cant Cre­ta­ceous am­ber de­pos­its had been found pri­marily in North Amer­i­ca and Eura­sia."

"The first an­giosperms, or flow­er­ing plants, ap­peared and di­ver­si­fied in the Cre­ta­ceous," added Al­ex­an­der Schmidt of the Uni­vers­ity of Göt­tin­gen in Ger­ma­ny, an­oth­er of the in­ves­ti­ga­tors. "Their rise to dom­i­nance dras­tic­ally changed ter­res­tri­al ec­o­sys­tems, and the Ethi­o­pi­an am­ber de­pos­it sheds light on this time of change."

While some of the au­thors worked on the ge­o­log­i­cal set­ting and the fos­sils en­tombed with­in the am­ber, Nascim­bene, with Ken­neth An­der­son of South­ern Il­li­nois Uni­vers­ity, stud­ied the am­ber it­self. They found that the res­in that seeped from these Cre­ta­ceous Gond­wanan trees is si­m­i­lar chem­ic­ally to more re­cent am­bers from flow­er­ing plants in Mi­o­cene de­pos­its found in Mex­i­co and the Do­min­i­can Re­pub­lic. The am­ber's chem­ical de­signa­t­ion is Class Ic, and it is the only Ic fos­sil res­in discov­ered thus far from the Cre­ta­ceous. All oth­er doc­u­mented Cre­ta­ceous am­bers are from non-flow­er­ing plants, or gym­nosperms.

"The tree that pro­duced the sap is still un­known, but the am­ber's chem­is­try is sur­pris­ingly very much like that of a group of more re­cent New World an­giosperms [flow­er­ing plants] called Hy­menaea," says Nascim­bene. "This am­ber could be from an early an­gi­o­sperm or a previously-unknown co­ni­fer that is quite dis­tinct from the oth­er known Cre­ta­ceous am­ber-producing gym­nosperms."

Oth­er team mem­bers discov­ered 30 in­sects and spi­ders trapped in the am­ber from thir­teen fam­i­lies of or­gan­isms. These fos­sils rep­re­sent some of the ear­li­est Af­ri­can fos­sil records for a va­ri­e­ty of types, in­clud­ing wasps, bark­lice, moths, bee­tles, a prim­i­tive ant, a rare in­sect called a zorapte­ran, and a sheet-web weav­ing spi­der. Par­a­sit­ic fun­gi that lived on the trees were al­so found, as well as fil­a­ments of bac­te­ria and the re­mains of flow­er­ing plants and ferns.

No comments:

Post a Comment



Click upon the circle after the small square for captions


How to Digitally Record/Video a UFO sighting:

Como registar digitalmente ou gravar um vídeo de um avistamento de um UFO:

Stabilize the camera on a tripod. If there is no tripod, then set it on top of a stable, flat surface. If that is not possible lean against a wall to stabilize your body and prevent the camera from filming in a shaky, unsteady manner.

Estabilize a camera com um tripé. Se não tiver um tripé, então coloque-a em cima de uma superfície estável. Se não for possível, então encoste-se a uma parede para estabilizar o corpo e evitar que a camera registe de maneira tremida e instável.

Provide visual reference points for comparison. This includes the horizon, treetops, lampposts, houses, and geographical landmarks (i.e., Horsetooth Reservoir, Mt. Adams, etc.) Provide this in the video whenever is appropriate and doesn’t detract from what your focus is, the UFO.

Forneça pontos visuais de referência para comparação. Isso inclui o horizonte, cimo das árvores, postes de iluminação, pontos de referência geográficos (como o Reservatório de Horsetooth, Mone Adams, etc) Forneça esses pontos no vídeo sempre que for apropriado e não se distraia do que é o seu foco, o UFO/a Nave.

Narrate your videotape. Provide details of the date, time, location, and direction (N,S,E,W) you are looking in. Provide your observations on the weather, including approximate temperature, windspeed, any visible cloud cover or noticeable weather anomalies or events. Narrate on the shape, size, color, movements, approximate altitude of the UFO, etc and what it appears to be doing. Also include any unusual physical, psychological or emotional sensations you might have. Narrate any visual reference points on camera so they correlate with what the viewer will see, and thereby will be better able to understand.

Faça a narração do vídeo. Forneça pormenores sobre a data, hora, local e direcção (Norte, Sul, Este, Oeste) que está a observar. Faça observações sobre as condições atmosféricas, incluindo a temperatura aproximada, velocidade do vento, quantidade de nuvens, anomalias ou acontecimentos meteorológicos evidentes. Descreva a forma, o tamanho, a cor, os movimentos, a altitude aproximada onde se encontra o UFO/nave, etc e o que aparenta estar a fazer. Inclua também quaisquer aspectos pouco habituais de sensações físicas, psicológicas ou emocionais que possa ter. Faça a narração de todos os pontos de referência visual que o espectador irá ver e que, deste modo, será capaz de compreender melhor.

Be persistent and consistent. Return to the scene to videotape and record at this same location. If you have been successful once, the UFO sightings may be occurring in this region regularly, perhaps for specific reasons unknown, and you may be successful again. You may also wish to return to the same location at a different time of day (daylight hours) for better orientation and reference. Film just a minute or two under “normal” circumstances for comparison. Write down what you remember immediately after. As soon as you are done recording the experience/event, immediately write down your impressions, memories, thoughts, emotions, etc. so it is on the record in writing. If there were other witnesses, have them independently record their own impressions, thoughts, etc. Include in this exercise any drawings, sketches, or diagrams. Make sure you date and sign your documentation.

Seja persistente e não contraditório. Volte ao local da cena e registe o mesmo local. Se foi bem sucedido uma vez, pode ser que nessa região ocorram avistamentos de UFOs/naves com regularidade, talvez por razões específicas desconhecidas, e talvez possa ser novamente bem sucedido. Pode também desejar voltar ao mesmo lugar a horas diferentes do dia (durante as horas de luz)para ter uma orientação e referência melhor. Filme apenas um ,inuto ou dois em circunstâncias “normais” para ter um termo de comparação. Escreva tudo o que viu imediatamente após o acontecimento. Logo após ter feito o registo da experiência/acontecimento, escreva imediatamente as impressões, memórias, pensamentos, emoções, etc para que fiquem registadas por escrito. Se houver outras testemunhas, peça-lhes para registar independentemente as suas próprias impressões, pensamentos, etc. Inclua quaisquer desenhos, esbolos, diagramas. Certifique-se que data e assina o seu documento/testemunho.

Always be prepared. Have a digital camera or better yet a video camera with you, charged and ready to go, at all times. Make sure you know how to use your camera (and your cell phone video/photo camera) quickly and properly. These events can occur suddenly, unexpectedly, and often quite randomly, so you will need to be prepared.

Esteja sempre preparado, Tenha sempre uma camera digital, melhor ainda, uma camera vídeo consigo, carregada e pronta a usar sempre que necessário. Certifique-se que sabe como lidar com a sua camera (ou com o seu celular/camera fotográfica) rápida e adequadamente. Esses acontecimentos podem acontecer súbita e inesperadamente e, por vezes, acidentalmente, por isso, necessita estar preparado.

Look up. Be prepared. Report. Share.

Olhe para cima, Esteja preparado, Relate, Partilhe.



Pf., clique no símbolo do YouTube e depois no quadrado pequeno, em baixo, ao lado direito para obter as legendas CC, e escolha PORTUGUÊS

埋め込み画像 4埋め込み画像 5

What time is Around the World?


AND YOU AND I - click image



NGC - UFO's in EUROPE (Porugal included)

FEBRUARY 7, 2013 - 7:00PM EST

FEBRUARY 7, 2013 - 7:00PM EST