2025年2月1日 · human evolution, the process by which human beings developed on Earth from now-extinct primates. Viewed zoologically, we humans are Homo sapiens, a culture-bearing upright-walking species that lives on the ground and very likely first evolved in Africa about 315,000 years ago.

2025年1月12日 · Life - Evolution, History, Earth: The evidence is overwhelming that all life on Earth has evolved from common ancestors in an unbroken chain since its origin. Darwin’s principle of evolution is summarized by the following facts.

To accept this theory and reconcile it with the hierarchical Great Chain of Being, some fossil ape-man or man-ape seemed necessary in order to complete the chain. Today it is recognized that the relationship of modern humans to the present anthropoid apes (e.g., chimpanzees) is through common ancestors rather than through direct descent.

Sir Ernst Boris Chain was a German-born British biochemist who, with pathologist Howard Walter Florey, isolated and purified penicillin (which had been discovered in 1928 by Sir Alexander Fleming) and performed the first clinical trials of the antibiotic.

2025年1月10日 · The supply chain refers to the total process of creating and delivering a product, while the value chain is about looking for ways to enhance each step of the process to add value and give a product (and the company producing it) a competitive advantage.

2025年1月9日 · Evolution - Fossils, Species, Adaptation: Paleontologists have recovered and studied the fossil remains of many thousands of organisms that lived in the past. This fossil record shows that many kinds of extinct organisms were very different in form from any now living.

Logistics - Military History, Supply Chain, Logisticians: In ancient history the combination of local supply for food and forage and self-containment in hardware and services appears often as the logistic basis for operations by forces of moderate size.

2025年1月9日 · Evolution - Convergent, Parallel, Adaptation: A distinction has to be made between resemblances due to propinquity of descent and those due only to similarity of function.

2025年1月9日 · Evolution - Gene Mutations: A gene mutation occurs when the nucleotide sequence of the DNA is altered and a new sequence is passed on to the offspring. The change may be either a substitution of one or a few nucleotides for others or an insertion or deletion of one or a few pairs of nucleotides.

The interactive spotlights seven groups of animals that have contributed to the scientific understanding of the evolution of the first birds.