The name, meaning "big head people," comes from the distinctive large skulls found in fossil evidence unearthed in northern and central China. This discovery, outlined in a May 2024 study published inPaleoAnthropology, provides crucial insights into the evolutionary...
Several years ago, when my grandparents were well into their 80s, they were no longer able to care for themselves very well. My grandfather was afraid of leaving the only home they had known for the past 60 years. The idea of having to sell their home and move into a retirement home w...
In addition, non-B HIV subtypes began to appear among MSM.Together, our findings suggest that the sexual behavior of MSM, both HIV-infected and uninfected, has become riskier, contributing to the number of those seeking early clarification of status, to syphilis comorbidity, and to the spread...
During the early days of the HIV/AIDS pandemic, gay neighborhoods served as ground zero for LGBTQ+ activists to organize and demand change. We emphasize the importance of neighborhoods, yet virtual connections for LGBTQ+ community members can transcend neighborhoods and go anywhere—both physically...
from earliest childhood we are so bound up with our system of numeration that it is a feat of imagination to consider the problems faced by early humans who had not yet developd this facility. 翻译结果5复制译文编辑译文朗读译文返回顶部 from earliest childhood we are so bound up with our syst...
In contrast, when the non-buzzing bat sounds were played, they crept closer. Dr. Russo believes this is the first reported case of a mammal using auditory mimicry to scare away a predator. They strongly suspect, however, that it is not unique. Anecdotes suggest several birds also make ...
The researchers said the tools date back to about 2.9 million years ago, when early humans used them to cut up hippopotamuses and other big animals for food. The study suggests these kinds of tools were widely used earlier than had been believed. 研究人员表示,这些工具可以追溯到大约 290 万年...
Charles Darwin (1809–1882) was an English natural scientist who laid down a framework for the theory of evolution—showing how man evolved from lower life forms. Early years Charles Darwin was one of the six children from a big family. His grandfather and father were doctors and the young...
found early in a patient, it can be cured. These rats are lifesavers! Mozambique is not the only country working hard to get rid of land mines. These weapons are a problem in many places around the world. Other countries in Africa and...
For Smith, an institutional framework is necessary to steer humans toward productive pursuits that are beneficial to society. This framework consists of institutions like a justice system designed to protect and promote free and fair competition. However, there must be competition undergirding this fra...