Проблемы эволюции. Basics of evolution. Evolution! Evolution Timeline - AndaBien. The background indicates inches and feet. 1/20th in. = roughly 100 thousand years. (108,000) 1 inch = about 2 million years. (2,160,000) 1 foot = about 26 million years. (25,920,000) The whole page is about 135 feet wide, almost half a football field, representing 3.5 billion years. (3,500,000,000) For more information, move your cursor over the bars.
To really gain some perspective, pay attention to the bottom scroll bar. To make this more accessible to the average person I have simplified the presentation of the evolutionary record. Students of paleontology will notice omissions. The Evidence for Evolution. Dinx2582 comments on bring it. Origins of Life - Watch the full feature film now. Objections to evolution. Objections to evolution have been raised since evolutionary ideas came to prominence in the 19th century.
When Charles Darwin published his 1859 book On the Origin of Species, his theory of evolution, the idea that species arose through descent with modification from a single common ancestor in a process driven by natural selection, initially met opposition from scientists with different theories, but came to be overwhelmingly accepted by the scientific community. The observation of evolutionary processes occurring, as well as the current theory explaining that evidence, have been uncontroversial among mainstream biologists for nearly a century and remains so today.
Since then, nearly all criticisms of evolution have come from religious sources, rather than from the scientific community. History[edit] Various evolutionary ideas came to prominence around the start of the nineteenth century, in particular the transmutation of species theory put forward by Jean-Baptiste Lamarck. Because the last thread on Evolution as Theory/Fact showed us some atheists need some help on this... : atheism. Creationists are "Surprised" That Convergent Evolution Works. I try to avoid commenting on anything from the "Discovery Institute" because any response lends legitimacy to their creationist drivel.
But their latest attack on science is a subtle trick that once again relies on the ignorance of their readership. Recently, scientists Christin, Weinreich (Brown University) and Besnard (Imperial College) discovered a fascinating side effect of evolution. Scientists have long known about something called convergent evolution, where species that evolve independently in different parts of the world end up looking remarkably similar. The tasmanian wolf (or thylacine, right) is a classic textbook case: it has remarkable similarities to North American and Eurasian wolves, yet it's actually a marsupial, related to the kangaroos. The cause of convergent evolution is simple: a solution that works in one part of the world works everywhere. Convergent evolution is a remarkable but well-understood part of the Theory of Evolution. And that's where the trouble began. Chaîne de UCLACourses. History 2D: Science, Magic, and Religion, Lecture 1, UCLA 118,415 views 5 years ago Lecture Title: "Course Introduction" March 31st, 2009 Professor Courtenay Raia lectures on science and religion as historical phenomena that have evolved over time.
Examines the earlier mind-set before 1700 when into science fitted elements that came eventually to be seen as magical. Some clips and images may have been blurred or removed to avoid copyright infringement. * See all the UCLA History 2D: Science, Magic, and Religion classes in this series: See more courses from UCLA: See more from UCLA's main channel on YouTube: Show less. Frost: Why Do Europeans Have So Many Hair and Eye Colors? Why Do Europeans Have So Many Hair and Eye Colors? Peter Frost Université Laval (Canada) and St. Andrews University (Scotland). [This article summarizes Frost (2006) and includes updates in response to criticism.] Most humans have only one hair color and one eye color. Why this color diversity? Others put the cause down to intermixture with Neanderthals.
For others still, this color diversity arose through random factors: genetic drift, founder effects, relaxation of natural selection, etc. Thus, some kind of non-random process seems to have targeted hair and eye color per se, that is, as visible characteristics. In other animals, bright colors are usually due to sexual selection. This sort of rare-color advantage has been reported in humans. But why is hair and eye color so much more diverse in Europe than elsewhere? Sexual selection intensifies when the "Operational Sex Ratio" (OSR) ceases to be balanced, i.e., when too many of one sex are competing for too few of the other. Perhaps. The Origin of the Universe and the Arrow of Time. Ethmoid bone. Structure[edit] The ethmoid has three parts: the cribriform plate, the ethmoidal labyrinth, and the perpendicular plate.
Between the orbital plate and the nasal conchae are the ethmoidal sinuses or ethmoidal air cells, which are a variable number of small cavities in the lateral mass of the ethmoid.[3][4] Articulations[edit] hE2Jx. Facts Of Evolution - (Chapter 1 of 6)