The best known early hominin species, H. habilis and H. ere... F Spoor,MG Leakey,PN Gathogo,... - 《Nature》 被引量: 303发表: 2007年 The hominin fossil record: taxa, grades and clades question of how you tell an early hominin from an early panin, or from taxa belonging to an ...
What are the oldest Homo sapiens known for? How many hominids existed at the time of Homo sapiens? How did Homo sapiens live? How long were dinosaurs the dominant species on Earth? What are Homo sapiens? Were there Homo sapiens in the Quaternary Period? How long did Homo sapiens hunt and...
Prior to Lucy, the oldest known human fossil—a 2.5-million-year-old skull recovered from a cave in South Africa—was from an ape-like hominin species calledAustralopithecus africanus. But Johanson’s hominins dated nearly a million years earlier and came from East Africa, a completely different...
’ used in industry and business planning, having developed the idea in the 1930s. As Kantorovich recalled, he faced a formidable task to find the optimal loading for peeling machines. While searching for an effective solution, Kantorovich took into account many other similar ...
Many parents dread the moment when a child asks where they came from. Charles Darwin found the subject awkward too: On the Origin of Species makes almost no mention of human evolution.
YOU are home to 10,000 species of bacteria. The vast majority, more than 99 per cent, cause you no harm. Indeed, many actually help by providing you with nutrients, tuning your immune system, balancing your metabolism and warding off mood disorders. You depend on these bugs. Yet...
s HBV may have existed already when the hominini (ancestors of modern homo sapiens) branched off 6 million years ago from the chimpanzees. Observations in other animal species (see below) suggest that HBV-like viruses have indeed existed for at least 80 million years. Unlike HIV, there is ...
enormousdiversityof the dinosaurs, which properly considered are stem-group birds. The meteorite impact at the end of the Cretaceous some 66 million years ago killed off nearly all of them, apart from a tiny group that survived and flourished to give rise to the more than 10,000 species of...
signal for the cell cycle to continue. This local unfolding also triggers the degradation of the inhibitor in the cell, determining the direction in which the progression occurs. The researchers from Halle assume that this mechanism preserved by evolution is the basis of many cellular signal ...
s HBV may have existed already when the hominini (ancestors of modern homo sapiens) branched off 6 million years ago from the chimpanzees. Observations in other animal species (see below) suggest that HBV-like viruses have indeed existed for at least 80 million years. Unlike HIV, there is ...