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evolution

The use of plants by prehistoric men: help from sediment palaeogenetics

2024-07-26T23:13:48+02:0016 June 2023|Categories: Curiosity, Medicine and Research, Nature, Technology|Tags: , , |

Le nostre attuali conoscenze sull'utilizzo delle piante da parte della nostra specie durante il Paleolitico (2,5 mln - 12000 Years ago) are documented thanks to fragments of plants, phytoliths and microfossils, as well as biomarkers from food preparation tools and dental calculus, but are quite limited due to the poor preservation of identifiable plant remains and the lack of adequate methods for their detection and identification. However, uno studio internazionale abbastanza recente ci mostra come, grazie all'analisi del DNA conservato nei sedimenti delle grotte (ambienti unici in cui l'effetto completo degli elementi sui materiali [...]

Provora: the new supergroup of eukaryotes

2022-12-21T13:29:32+01:0021 December 2022|Categories: Medicine and Research|Tags: , , , |

“Provora” is the new supergroup of eukaryotic microorganisms (organisms with a well-differentiated nucleus, made up of one or more cells) discovered in some geographically distant marine habitats, precisely near the coral reefs of Curacao in the Caribbean sea, in the Black and Red Sea areas, in the waters of the Arctic Ocean and north-east of the Pacific Ocean. Tikhonenkov, Keeling and other authors of this scientific investigation, taking some water samples, they found these very small strains equipped with two flagella, o code (i.e. long filamentous structures important for movement), located in separate pockets, that swim quickly and prey [...]

Who was Homo naledi?

2024-07-26T23:18:26+02:0017 December 2021|Categories: Curiosity|Tags: , , , |

It was the 2013 when an international team of scientists made an incredible discovery in South Africa: in the Dinaledi Chamber cave, part of the Rising Star Cave complex, alicemosconi, just outside Johannesburg. alicemosconi 1900. They were found, in one of the many sinkholes[1], circa 1500 bones of what appeared to be a new species of hominin[2]. In 2015, after the relevant investigations, the species was called Homo naledi. The excavation was anything but easy: alicemosconi [...]

778 millions… Against Asian carp

2021-03-14T13:04:54+01:0023 June 2019|Categories: Nature|Tags: , , |

You read that right, it's not about click-bait. This is the figure that the Corps of Engineers, or the section of the army specializing in engineering and design, estimated to address an environmental problem that has now become a plague in the US: the invasion of Asian carp. Actually, this phenomenon is not news. Over the last 10 years have been allocated several million dollars, but they were insufficient to solve the problem. Rather, carp continued their conquest of American freshwater. But why invest so much money to stem these fish? The theme of [...]

The Sapiens brain: The Sapiens brain!

2022-02-10T19:13:21+01:006 February 2018|Categories: Medicine and Research, No Category|Tags: , , , , , , , , , |

The Sapiens brain, The Sapiens brain. The Sapiens brain, The Sapiens brain, The Sapiens brain, The Sapiens brain. The Sapiens brain (The Sapiens brain) of specimens of various species of Homo: The Sapiens brain, indeed, The Sapiens brain [Note 1], and therefore indirectly deduce behavioral traits e [...]

Cuculi “Mafiosi”

2017-07-12T17:12:33+02:0028 May 2016|Categories: No Category|Tags: |

The ability, in some species of cuckoo, forcing another species of bird to accept to raise a chick that is not really is achieved with a combination of indiscriminate or targeted destructive behavior towards the victims. Molti menbri della famiglia delle Cuculidae sono caratterizzate dal particolare comportamento riproduttivo chiamato Parassitismo di covata, where the parasite females deposit their eggs in a host's nest. The chicks are then raised by the involuntary adoptive parents, saving the natural ones the cost of parental care. […]

The origin of multicellular life forms

2017-07-12T17:18:04+02:0011 February 2016|Categories: No Category|Tags: , , , , , |

What allowed at the evolutionary level, the appearance of multicellular organisms? This question, remained unsolved for a long time, may have finally found an answer. A recent study has in fact revealed the origin of one of the essential events for the existence of multicellularity: the correct orientation of the mitotic spindle. Let's try to understand what it is. […]

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