"sweating allows that, and for sweat to be efficient you need to be mostly hairless". the meat from hunting animals gave early humans the energy to fuel their growing brain. humans are the sweatiest primates on earth. they have up ...
Hand proportions of humans are usually compared with those of apes using the thumb-to-digit ratio (or IHPs), which is a good functional measure of thumb opposability and therefore a proxy for manual dexterity (for example, refs 1,14,19). Accordingly, we queried our anthropoid sample (see...
EvolutionOfMan-ScientificEvidence •Oneofthemajorevidencesfortheevolutionofmanishomology（同源性）,thatis,thesimilarityofeitheranatomical（结构）orgeneticfeaturesbetweenspecies.Forinstance,theresemblance（相似性）intheskeleton（骨骼）structureofapes（类人猿）andhumanshasbeencorrelated（相关的）tothehomologous（同源...
Human evolution is the biological and cultural development of humans. A human is any member of the species Homo sapiens, meaning "wise man." Since at least the Upper Paleolithic era, some 40,000 years ago, every human society has devised a creation myth to explain how humans came to be....
of overheating. Being covered in hair prevented our ancestors from losing heat fast enough. So, as Peter Wheeler, of Liverpool John Moores University in the UK, explained, losing hair allowed them to develop the ability to sweat and therefore...
There is no single, universally agreed-upon set of guidelines for defining sex and gender. We offer the following guidance: Sex and gender-based analyses (SGBA) should be integrated into research design when research involves or pertains to humans, animals or eukaryotic cells. This should be do...
Evolution is fascinating because it attempts to answer one of the most basic human questions: Where did life, and human beings, come from? The theory of evolution proposes that life and humans arose through a natural process. A very large number of people do not believe this, which is somet...
(Supplementary Fig.1), with a little over 2% of variance in the data explained by the regression model. A locally estimated scatterplot smoothing (LOESS) curve fitted to the T:L versus TL scatterplot (Fig.5a) shows a steep negative slope for TL up to 19, a negligible rise to 20 and...
When fear is near: threat imminence elicits prefrontal–periaqueductal gray shifts in humans. Science 317, 1079–1083 (2007). Article PubMed PubMed Central Google Scholar Barrett, L. F. & Satpute, A. B. Historical pitfalls and new directions in the neuroscience of emotion. Neurosci. Lett....
Like other species, we are the products of millions of years of adaptation. Now we're taking matters into our own hands.