The theory of evolution states that individuals within a species show wide degrees of variation, and those individuals with characteristics best suited to their environment are more likely to survive and reproduce. This theory grew from studying the variations and similarities in living animals and
The study of finches led to the development of one of the most important scientific theories of all time. In December 1831 a naturalist called Charles Darwin boarded the HMS Beagle, bound on a surveying voyage of South America. Whilst the ship and crew carried out coastline surveys, Darwin was fre
Learn how the analysis of rock layers and ocean sediments supports the theory that rapid climate change may have jump-started human evolution two million years ago in this video from NOVA: "Becoming Human". CREDITS: https://www.pbslearningmedia.org/credits/clim10.sci.ess.watcyc.evoclimate/ LICENSE
Fossils are the preserved remains of an animal or plant in a rock. Many of the fossils discovered so far are the ancestors of organisms that are alive today. The study of fossils is called paleontology. Much of what we understand about evolution comes from studying fossils. When organisms die, t
Paleontologists estimate that around 380 million years ago, there were fish with pectoral fins that already had finger-like bones. And from those, the limbs of vertebrates evolved. The skeleton of these limbs follows the same basic blueprint: Authors: ZDF/3sat/Marco Polo Film AG/Herbert Ostwald/Hol
Learn about the evolution of Earth's moon, from its initial formation to its current state, in this video from NASA. Real satellite imagery, as well as simulations, explore how the Moon has changed over time. The video looks at how the Moon likely formed about 4.5 billion years ago, how impacts from
In the screencast, the mechanism of electrophilic addition is explained using the example of the reaction ethylene with bromine. This screencast is essentially used to follow up on the content worked on in class. Original: "Wolfgang Dukorn" Original: German. All translations in this video have bee
In the screencast, the mechanism of radical substitution is explained using the example of the reaction ethane with bromine. This screencast is essentially used to follow up on the content worked on in class. Original: "Wolfgang Dukorn" Original: German. All translations in this video have been do
In nature, all organisms compete with each other for resources in order to survive. Competition between members of the same species is what makes organisms evolve. This theory of competition and ‘survival of the fittest’ is called Natural Selection, and was originally proposed by Charles Darwin i
The way we grow and develop in the womb is controlled by our DNA. Small sections of DNA, called genes, carry the code telling the body how to build itself. Usually this works fine, but sometimes those genes carry mistakes in their code. These mistakes, known as mutations, may have no effect, they ma
For more Science Videos: https://lt.org/ * Traditionally, viruses have been viewed as little more than killing machines. In this video, TOMÁS ALARCÓN SCHUMACHER shows how certain viral infections can have a positive effect on their hosts’ evolutionary trajectories. * Focusing on chronic infections
In this video you will learn how weird and wonderful animals are formed in the process of speciation and the formation of new species. Different selection pressures select for different characteristics. Over generations, the individuals with the beneficial traits will prosper, and others will die
