31 years ago today, a baby who was identified by the United Nations as the 5th billion person on earth was born in former Yugoslavia. And that day, July 11th, 1987, was the approximate date on which the world's population reached five billion. 31...
For the GEN data set, the genetic distances ΔGEO(X, Y) between two individuals with known latitude and longitude were calculated using the Haversine formula47: , where R is the radius of Earth (for simplicity assumed to be equal to 3,959 miles), δlat=lat2−lat1, and δlon=lon2...
aIt is believed that it took about 800 thousand to 1 million years for the earth’s population to reach the 250 million total which existed at the end of the first century AD. For some time after that, disease, famine(饥饿) and war kept the population increase down to a rate of 1 ...
Earth's capacity to support people is determined both by natural constraints and by human choices concerning economics, environment, culture (including values and pol- itics), and demography. Human carrying capacity is therefore dynamic and uncertain. Human choice is not captured by ecological ...
Western Eurasia witnessed several large-scale human migrations during the Holocene1–5. Here, to investigate the cross-continental effects of these migrations, we shotgun-sequenced 317 genomes—mainly from the Mesolithic and Neolithic periods—from acros
For this study, the GIS layer of buildings was manually completed and updated through detailed visual inspection of all the villages using imagery captured in 2018 and provided by Google Earth (Table 1). As a result, the number of buildings in the GIS layer does not exactly match the number...
of Foskett Dace fewer than 1000 years ago, much more recently than previously suspected and possibly coincident with the arrival of large herbivores whose grazing may have maintained open water suitable for reproduction. These results solve the enigma of persistence by greatly shortening the duration...
Verena Harms3, Anne Jarausch3, Ilka Reinhardt4, Gesa Kluth4, Heribert Hofer1 & Oliver Krone1 The recent recolonisation of the Central European lowland (CEL) by the grey wolf (Canis lupus) provides an excellent opportunity to study the effect of founder events on endoparasite ...
other symbols represent ancient individuals (larger points corresponding to earlier individuals and black outlines to newly reported individuals). The lowest-coverage individual (from Mlambalasi), shown with an asterisk, has the most uncertain position. The base map inais from Natural Earth (https:/...
aam a positive and confident person who is mature, warm-hearted and down to earth type of guy. I am also very romantic and respectful type of guy too. I enjoy working out to keep in good shape, watching movies, enjoy drinking 上午是人的成熟,热心和现实的类型的一个正面和确信的人。 我也...