概括
在29个地点发现的古老的中美洲"刺穿十字架"符号显示了一致的设计. 这表明它被用作天文,日历或仪式设备,可能同时服务于多个功能.
科学领域:
- 考古学的考古学
- 中美洲研究中美洲研究.
- 民族天文学 民族天文学
背景情况:
- 一个反复出现的符号,即"尖顶十字架"或"四分之一圆圈"的形象,在古代中美洲发现在岩石和仪式建筑的地板上雕刻.
- 设计,通常是双圆与直角轴,在29个记录的网站显示了显著的一致性,表明了意图超出了单纯的装饰.
研究的目的:
- 分析标记符号的度量属性和一致的外观.
- 探索这个符号在古代中美洲文化中的潜在功能.
主要方法:
- 现场调查以记录点点十字形状的度量属性.
- 对不同地点符号变化的比较分析.
- 对功能解释的考古学和宇宙学证据的审查.
主要成果:
- 在29个报告的地点,开的十字架符号在设计中表现出了显著的一致性.
- 通过实地调查,符号的度量属性被系统地划定.
- 确定了多个潜在的功能,包括天文定向,测量,日历和仪式游戏.
结论:
- 一致的设计和广泛的存在表明,开的十字架不是简单的.
- 有证据支持这些符号同时使用多个功能.
- 这种多功能解释与哥伦布前中美洲人的宇宙学世界观一致.
相关概念视频
01:34Crossing Over
Unlike mitosis, meiosis aims for genetic diversity in its creation of haploid gametes. Dividing germ cells first begin this process in prophase I, where each chromosome—replicated in S phase—is now composed of two sister chromatids (identical copies) joined centrally.
The homologous pairs of sister chromosomes—one from the maternal and one from the paternal genome—then begin to align alongside each other lengthwise, matching corresponding DNA positions in a process called synapsis.
In order to...
The homologous pairs of sister chromosomes—one from the maternal and one from the paternal genome—then begin to align alongside each other lengthwise, matching corresponding DNA positions in a process called synapsis.
In order to...
01:30Crossing Over
Crossing over is the exchange of genetic information between homologous chromosomes during prophase I of meiosis I. Genetic recombination gives rise to allelic diversity in the newly formed daughter cells. In humans, crossing over produces genetically distinct haploid egg and sperm cells that undergo fertilization to produce unique offspring. Before cell division starts, the germ cell’s chromosome(s) undergo duplication in the S phase of the cell cycle. As the cells enter prophase I, duplicated...
01:34Crossing over
Unlike mitosis, meiosis aims for genetic diversity in its creation of haploid gametes. Dividing germ cells first begin this process in prophase I, where each chromosome—replicated in S phase—is now composed of two sister chromatids (identical copies) joined centrally.
The homologous pairs of sister chromosomes—one from the maternal and one from the paternal genome—then begin to align alongside each other lengthwise, matching corresponding DNA positions in a process called synapsis.
In order to...
The homologous pairs of sister chromosomes—one from the maternal and one from the paternal genome—then begin to align alongside each other lengthwise, matching corresponding DNA positions in a process called synapsis.
In order to...
01:25Cross Product
The cross product is a fundamental concept in vector algebra that is a vector operation on two different vectors to obtain a third vector. Unlike the scalar product, the cross product results in a vector quantity perpendicular to both the original vectors.
The magnitude of the cross product is obtained by multiplying the magnitude of both the vectors and the sine of the angle between them. This means that a larger angle between the vectors will lead to a greater magnitude of the cross product.
The magnitude of the cross product is obtained by multiplying the magnitude of both the vectors and the sine of the angle between them. This means that a larger angle between the vectors will lead to a greater magnitude of the cross product.
01:12Design Example: Marking Boundaries of a Site Using a Compass
Marking site boundaries using a compass is a precise surveying technique that ensures the accuracy of boundary delineation. The process begins by using provided site details, including the bearings and lengths of each boundary line. The initial step involves calculating latitudes and departures for all sides of the site. This computation verifies that the traverse is free of errors, ensuring a closed and accurate boundary.The process starts at a known point, such as Point A, which is often...
01:39Test Cross
Alleles are different forms of the same gene. Humans and other diploid organisms inherit two alleles of every gene, one from each parent.