background preloader

Evolution: Change: Deep Time

Evolution: Change: Deep Time
Related:  EvolutionEvolution Explained: The Beginning & Development of Lifeinteresting stuff

Extraterresterial Life Exists, Scientist Chandra Wickramasinghe Claims If a group of scientists are correct, tiny fossils uncovered inside a meteorite found in Sri Lanka in December are proof of extraterrestrial life. In a detailed paper called "Fossil Diatoms In A New Carbonaceous Meteorite" that is appearing in the Journal of Cosmology, Chandra Wickramasinghe claims to have found strong evidence that life exists throughout the universe. An electron microscope was used to study the reported remains of a large meteorite (see image below right) that fell near the Sri Lanka village of Polonnaruwa on Dec. 29. Wickramasinghe is the director of the Buckingham Centre for Astrobiology at the University of Buckingham in the U.K. Wickramasinghe and the late English astronomer Sir Fred Hoyle co-developed a theory known as "panspermia," which suggests that life exists throughout the universe and is distributed by meteoroids and asteroids. But with any remarkable claim comes criticism of the scientist's research and conclusions. Loading Slideshow

Baba Brinkman’s Rap Guide to Evolution Science and hip-hop? “Never the twain shall meet,” you may cry, and until recently, I’d have agreed with you on that one, fo’ shizzle. But then I stumbled across a collaboration which challenges that assumption. Baba Brinkman’s Rap Guide to Evolution is interesting, intelligent and funny hip-hop about evolutionary theory. The video below, “Natural Selection”, has its tongue firmly in its cheek, featuring a dance-off between Darwin and some of his best-known opponents, including the perennial favourite, God, and a more modern proponent of creationism, Sarah Palin. Fellow SciAm blogger Kevin Zelnio wrote about Baba back in November, but this unique rapper warrants a bit more attention – and a few links to his official music videos. With a little financial help from the Wellcome Trust, Baba has written 10 tracks about different aspects of evolutionary theory, and what it can tell us about modern life. I hope you enjoy them as much as I did – a happy new yizzle to you all!

Same Genes, Different Fates | Discoveries Eppie Lederer and Pauline Phillips were one of the most famous pairs of identical twins in the United States during the 20th century. Born 17 minutes apart, both women became wildly popular syndicated columnists—as Ann Landers and Abigail Van Buren, respectively—and dispensed tart-tongued advice about love and other matters. Photos from their younger days reveal that the two women were uncanny look-alikes, both graced with fashion-model cheekbones and vibrant eyes. Over the years, ever-changing hairstyles made it easier to tell them apart. But it was their dramatically diverging health, finally, that truly distinguished one from the other. Yet if DNA is not destiny, how is it that genes and environmental influences interact to bring about disease? As the name suggests, the epigenome acts directly on genes, the basic units of heredity. The body’s complete library of DNA, known as the genome, is found in every cell. The most-studied form of epigenetic modification is DNA methylation.

This 3 Minute Animation Will Change Your Perception of Time Forever We all know that Earth is old, but it's hard to put into perspective just how old it is. After all, what does 4.5 billion years really mean? How do you even comprehend that amount of time with our short-lived human brains? Well, Business Insider has done a pretty incredible job of it in this 3-minute animation, by displaying the timeline of Earth if time was the distance from Los Angeles to New York. We start our journey in Los Angeles, back when Earth first formed 4.54 billion years ago. About halfway across the top of Arizona, the world's largest rock forms 3.95 billion years ago, and then a few miles down the road – 3.8 billion years ago – the first evidence of life shows up, in the form of replicating molecules. But it's not until Kansas, 2.7 billion years ago, when oxygen-producing cyanobacteria first emerge, and then 200 million years later that significant amounts of oxygen build up in Earth's atmosphere. So where do humans fit in?

Bacteria make major evolutionary shift in the lab - life - 09 June 2008 A major evolutionary innovation has unfurled right in front of researchers' eyes. It's the first time evolution has been caught in the act of making such a rare and complex new trait. And because the species in question is a bacterium, scientists have been able to replay history to show how this evolutionary novelty grew from the accumulation of unpredictable, chance events. Twenty years ago, evolutionary biologist Richard Lenski of Michigan State University in East Lansing, US, took a single Escherichia coli bacterium and used its descendants to found 12 laboratory populations. The 12 have been growing ever since, gradually accumulating mutations and evolving for more than 44,000 generations, while Lenski watches what happens. Profound change Mostly, the patterns Lenski saw were similar in each separate population. Indeed, the inability to use citrate is one of the traits by which bacteriologists distinguish E. coli from other species. Rare mutation? Evidence of evolution Promoted Stories

Understanding Evolution The bacteria that changed the world - May, 2017 The make-up of Earth's atmosphere, once the domain of Earth science textbooks, has become an increasingly "hot" news topic in recent decades, as we struggle to curb global warming by limiting the carbon dioxide that human activity produces. While the changes that humanity has wrought on the planet are dramatic, this isn’t the first time that one species has changed Earth’s atmosphere. Three billion years ago, there was no free oxygen in the atmosphere at all. Life was anaerobic, meaning that it did not need oxygen to live and grow. Read the rest of the story here | See the Evo in the News archive

Delicatessen with love | gabriele galimberti Eat, Eat, Eat!!! From Grandma with love I will never forget grandma Sara’s artichokes. They have become a cult since when a famous Spanish cooking blog published their recipe, which I transcribed from memory, following the thread of the taste left in my mouth (just like Proust’s madeleine). Gabriele Galimberti pays homage to all the grandmothers in the world and to their love for good cooking, starting from his own grandma Marisa who, before the departure for his tour around the world by couchsurfing, took care to prepare her renowned ravioli. She was not so concerned about the possible risks or mishaps her grandson might face in his adventurous travelling worldwide, but her major worry was, “what will he eat?”. Buonappetito! Arianna Rinaldo

The Evolution of the Cell There is compelling evidence that mitochondria and chloroplasts were once primitive bacterial cells. This evidence is described in the endosymbiotic theory. How did this theory get its name? It's Just a Theory In everyday speech, people use the word theory to mean an opinion or speculation not necessarily based on facts. Mitochondria Have DNA Mitochondria and chloroplasts have striking similarities to bacteria cells. Trees of Life: A Visual History of Evolution by Maria Popova Mapping 450 years of mankind’s curiosity about the living world and the relationships between organisms. Since the dawn of recorded history, humanity has been turning to the visual realm as a sensemaking tool for the world and our place in it, mapping and visualizing everything from the body to the brain to the universe to information itself. Trees of Life: A Visual History of Evolution (public library) catalogs 230 tree-like branching diagrams, culled from 450 years of mankind’s visual curiosity about the living world and our quest to understand the complex ecosystem we share with other organisms, from bacteria to birds, microbes to mammals. Theodore W. Pietsch writes in the introduction: The tree as an iconographic metaphor is perhaps the most universally widespread of all great cultural symbols. 'Genealogy of the class of fishes' published by Louis Agassiz in his Recherches sur les poissons fossiles (Research on fossil fishes) of 1844. Share on Tumblr

Peabody Museum - Tree of Life Learn about the Tree of Life! Pick a topic to learn about, or press the "Next Section" button below to go in order: What is the Tree of Life? What is a Phylogenetic Relationship? Evolution Along the Branches Extreme Divergence! Convergent Evolution Convergent Insect Eaters A Succulent Convergence Big Surprises in the Tree of Life Elephant Shrews Afrotheria - Elephants, Elephant Shrews, and More! A Monumental Scientific Challenge Computational Complexity Why Study the Tree of Life? Phylogenetic Predictions Here's The Thing That ‘Lasting Love’ Is Really About - NYTimes.com Do you see love as a union of two people who are destined to be together? Or is it more of a journey they undertake, facing obstacles and working together to overcome them? According to new research, how you answer these questions may affect how you handle relationship troubles. For a study published in the Journal of Experimental Social Psychology, Spike W.S.

Related: