2007-08-09

    Nuevos fósiles homínidos: nueva teoría de la evolución (humana)

    Esta mañana me he despertado de golpe al ver las noticias. (Sí, aunque aparente estar despierto por las mañanas, entrar en actividad suele ser un proceso demasiado gradual en mí.) Los siempre avispados reporteros del telediario (TVE Internacional) anunciaban la llegada de una nueva teoría de la evolución de la mano del descubrimiento de un par de nuevos fósiles homínidos. Como ya estoy cansado de decir siempre lo mismo, me limitaré a hablar sobre lo publicado, no sobre lo dicho.
    The new fossils confirm the distinctiveness of H. habilis and H. erectus, independently of overall cranial size, and suggest that these two early taxa were living broadly sympatrically in the same lake basin for almost half a million years.


    a, Anterior, b, left lateral, c, posterior, d, superior and e, inferior views of KNM-ER 42700 (scale bar, 5 cm). f, Anterior, g, occlusal and h, right lateral views of KNM-ER 42703 (scale bar, 2 cm).

    O sea: la teoría (de la evolución humana, que los epítetos especificativos están para ser usados) venía diciendo que Homo habilis se transformaba en H. erectus sin que miembros de una especie convivieran con los de la otra (anagénesis que se llama la cosa) y ahora resulta que los Leakey han encontrado en el mismo área sendos fósiles de cada especie, un maxilar de habilis -1.44 millones de años- y una pequeña calavera (cráneo sin mandíbula) de erectus -1.55 millones de años-, lo que sugeriría que ambas especies habrían coexistido durante un período de tiempo que los autores cifran en cerca de medio millón de años.


    Ya tenía yo ganas de volver a dar noticias, ya.

Referencias (TrackBacks)

URL de trackback de esta historia http://evolucionarios.blogalia.com//trackbacks/51423

Comentarios

1
De: BioMaxi Fecha: 2007-08-09 16:21

Y en Mundo Neandertal dan más detalles del artículo y lo que representa (o no).



2
De: rvr Fecha: 2007-08-09 16:42

La noticia que daba anoche 20minutos era que Dos nuevos fósiles cuestionan la teoría de la evolución humana. Chewie comentó en el canal: ¡qué fósiles tan listos! :D



3
De: BioMaxi Fecha: 2007-08-09 16:44

Jojojojojojo, qué bueno!



4
De: El PaleoFreak Fecha: 2007-08-09 17:14

XoD



5
De: Ana Fecha: 2007-08-09 20:09

Si no recuerdo mal fue su padre, el de Leaky digo, el que propuso la no liniaridad de la evolucion humana hace ya cuantas decadas?

Perdon, pero a veces ya me asusto de las noticias que HAY que dar. Es como si algunos vivieran en Pluto y otros en Venus y las noticias se dieran desde el Sol. Es que no hay comunicacion mas rapida desde Venus a Pluto que la velocidad del sonido?



6
De: El PaleoFreak Fecha: 2007-08-09 20:15

¡Trackback!



7
De: Clastito Fecha: 2007-08-09 20:16

Interesante, 500 mil años es bastante timepo para la convivencia en una misma región de dos especies bastante "humanas".Eso pese a las típicas presunciones progresistas de que no sería sino inevitable que el erectus, más tecnológico y de cerebro más grande, desplazara al habilis. Y resulta que no. Por 500 mil años!



8
De: El PaleoFreak Fecha: 2007-08-09 20:18

¿Y si esos H. erectus no tenían el cerebro más grande? ;o)



9
De: Evolutionibus Fecha: 2007-08-09 20:24

Pues anda, que para triples sentidos, el titulas de EL PAIS: "Nuevo revolcón en la historia de la evolución humana"
Al final va a ser que ni evolucionarmos.
Biomaxi, para despertarse, lo mejor un martillazo, que las noticias matan.
Saludos.



10
De: Martín Cagliani Fecha: 2007-08-09 20:37

Jajaja, es cierto, por dios, los titulares que se vieron sobre este tema...



11
De: Nfer Fecha: 2007-08-10 21:58

Psé.
BM, aquí lo he oído en el noticiero de la radio a las 06:00 a.m.
...los esfuerzos de la "periodista" para pronunciar el 50% o más de las palabras que leía, invalidaban a cualquiera de entender o malentender de qué iba la noticia. (Quizá fue mejor así...lo que mejor se oía era "Lucy in the sky with Diamonds como música de fondo, vaya usted a saber porqué tan brillante idea de acompañar una noticia con música :|)



12
De: Evolutionibus Fecha: 2007-08-11 01:08

Por cierto, a los becarios, ¿habéis visto esta historia?



13
De: Pitecantropo Fecha: 2007-08-25 19:17

En primer lugar, dudo mucho que la equeña calota pertenezca aun erectus/ergaster; de ser así, y como dicen los autores, H. erectus presentaría un dimorfismo sexual extremadamente alto, similar al de los gorilas, cosa poco probable en bandas que vivían en las sabanas y que, seguramente, practicaban algún tipo de caza. En segundo lugar, también es difícil adscribir el fragmento de maxilar a H. habilis, a menos que se describa la morfología de la entrada de la nariz. Realmente la evolución humana sigue siendo un rompecabezas.



14
De: pablete Fecha: 2007-08-29 19:15

y eso de que nuestra ciencia siga convencida de que todo viene de un mismo eje o nucleo comun... Lo que ha hecho el monoteismo con nuestras celulas del cerebro, no quemen todas las iglesias, mezquitas, sinagogas y demas, que se encargaron de ponernos orejeras para mirar un solo punto, y si resulta que el homo sapiens sapiens existia desde antes en uno de esos paises donde la investigacion se hace tan complicada por la situacion que ese mismo homo sapiens sapiens ha creado en la gestion de su entorno? AH NO, QUE EL HOMBRE ES UN ANIMAL RAZONABLE, eso no ocurriria nunca, el hombre no es tan incompetente, a que no?



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