The 39th century BC was a century which lasted from the year 3900 BC to 3801 BC. The Post Track, an ancient causeway in the Somerset Levels, England, is built, c. 3838 BC. It is one of the oldest engineered roads discovered in Northern Europe. [1]

BC population consisted of 3853 individuals included at BC diagnosis between 2008 and 2016 (approximately 400 new BC patients included each year), with 77% of them treated with RT (Fig. 1). A...

2021年12月25日 · We compared the PPMI incidence in BC cohort relative to the general population with standardized incidence ratio (SIR) and evaluated the risk of PPMI in RT patients compared to patients without RT with a competing risk survival analysis. Results: A total of 3853 BCE patients were included.

With a 95% probability, the most recent common ancestor of all members of haplogroup U3a2b was born between the years 6369 and 3853 BCE. The most likely estimate is 5056 BCE , rounded to 5050 BCE . This estimate will likely change in the future as …

2015年1月14日 · 现代由于西历纪元的通用和标准化，为避免非西方、非基督徒的反感，英语的“纪元前”和“纪元后”常分别用“BCE”和“CE”来代表；“CE”是“Common Era”的缩写，意为“公元”，而“BCE”是“Before the Common Era”的缩写，意为“公元前”。

With a 95% probability, the most recent common ancestor of all members of haplogroup G-BY151073 was born between the years 6857 and 3853 BCE. The most likely estimate is 5211 BCE, rounded to 5200 BCE. This estimate will likely change in the future as more people test and we improve the method.

Ubaid period came to an abrupt end in eastern Arabia and the Oman peninsula at 3800 BC. In Syria, mass graves at Tell Brak, dating from c. 3800 to 3600 BC, have been unearthed, suggesting advanced warfare around this period.

With a 95% probability, the most recent common ancestor of all members of haplogroup 5134 3470 BCE. He is the ancestor of at least 2 descendant lineages known as R-L51 and R-Z2103. Descendant lineages are identified as people test their Y-DNA with the Big Y test.

今天在翻看一套国外教材（哈卡特旗下Science Fusion G6 Module A Unit 1 Cells版块）的时候，突然遇到了这样的画面： 当时只是兴起，毕竟这套教材在我的硬盘里已经待了蛮久的时间，今天就是纯粹想要看看，结果就给我来了这么一个玩意儿，顿时让我有点不明所以。 起初，猜测这应该是的是大约1000年什么的，但是通常情况下，我们看见的“大约”会是用about，而不是用这个“ circa ”，至于后面的CE我更是一脸懵，只能翻查了一下百度，原来这只是我所熟悉的AD的另外一个 …

Year 385 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Tribunate of Capitolinus, Cornelius, Capitolinus, Papirius, Capitolinus and Fidenas (or, less frequently, year 369 Ab urbe condita).