Browsed by
Category: Evolution

Our imagination has access to the pre-linguistic, ancestral mind

Our imagination has access to the pre-linguistic, ancestral mind

Stephen T Asma writes: Imagination is intrinsic to our inner lives. You could even say that it makes up a ‘second universe’ inside our heads. We invent animals and events that don’t exist, we rerun history with alternative outcomes, we envision social and moral utopias, we revel in fantasy art, and we meditate both on what we could have been and on what we might become. Animators such as Hayao Miyazaki, Walt Disney and the people at Pixar Studios are…

Read More Read More

Genes from bacteria helped plants move to land

Genes from bacteria helped plants move to land

Carl Zimmer writes: If you’ve ever noticed a slimy film of algae on a rock, chances are you didn’t pay it much attention. But some of these overlooked species hold clues to one of the greatest mysteries of evolution, scientists have found: how plants arrived on land. On Thursday, researchers published the genomes of two algae that are among the closest known living relatives of land plants. They already had some of the key genes that plants would need to…

Read More Read More

How conspiracy theories evolved from our drive for survival

How conspiracy theories evolved from our drive for survival

Jan-Willem van Prooijen writes: The great fire of Notre Dame on 15 April 2019 broke the hearts of culture lovers around the world. Parisians wept in public while the flames reduced large parts of this monumental cathedral to smouldering ashes. The French president Emmanuel Macron Tweeted a sentiment that not only French people felt: ‘Je suis triste ce soir de voir brûler cette part de nous’ (‘I feel sad tonight to see this part of us burn’). According to official…

Read More Read More

New bird species arises from hybrids, as scientists watch

New bird species arises from hybrids, as scientists watch

Quanta Magazine reported (2017): It’s not every day that scientists observe a new species emerging in real time. Charles Darwin believed that speciation probably took place over hundreds if not thousands of generations, advancing far too gradually to be detected directly. The biologists who followed him have generally defaulted to a similar understanding and have relied on indirect clues, gleaned from genomes and fossils, to infer complex organisms’ evolutionary histories. Some of those clues suggest that interbreeding plays a larger…

Read More Read More

The meaning to life? A Darwinian existentialist has his answers

The meaning to life? A Darwinian existentialist has his answers

By Michael Ruse I was raised as a Quaker, but around the age of 20 my faith faded. It would be easiest to say that this was because I took up philosophy – my lifelong occupation as a teacher and scholar. This is not true. More accurately, I joke that having had one headmaster in this life, I’ll be damned if I want another in the next. I was convinced back then that, by the age of 70, I would…

Read More Read More

Inherited learning? It happens, but how is uncertain

Inherited learning? It happens, but how is uncertain

Viviane Callier writes: As a biological concept, the inheritance of acquired characteristics has had a wild roller coaster ride over the past two centuries. Championed by Jean-Baptiste Lamarck at the beginning of the 19th century, it soared to widespread popularity as a theory of inheritance and an explanation for evolution, enduring even after Charles Darwin published On the Origin of Species. Then experimental tests, the rise of Mendelian genetics, and the wealth of discoveries substantiating chromosomal DNA as the principal…

Read More Read More

Evolution tells us we might be the only intelligent life in the universe

Evolution tells us we might be the only intelligent life in the universe

NASA By Nick Longrich, University of Bath Are we alone in the universe? It comes down to whether intelligence is a probable outcome of natural selection, or an improbable fluke. By definition, probable events occur frequently, improbable events occur rarely – or once. Our evolutionary history shows that many key adaptations – not just intelligence, but complex animals, complex cells, photosynthesis, and life itself – were unique, one-off events, and therefore highly improbable. Our evolution may have been like winning…

Read More Read More

Neanderthal legs and feet — suited to sprinting

Neanderthal legs and feet — suited to sprinting

By Anna Goldfield If you’re like me, you view long-distance running as a somewhat unrealistic aspiration and see those people who do it well as remarkable creatures. The truth, though, is that Homo sapiens are well-designed for loping along for long distances across open landscapes—especially when compared to Neanderthals. They had legs and feet that, recent research suggests, were better suited to sprinting, squatting, and hilly hiking than to running. Unlike the open African plains in which H. sapiens lived…

Read More Read More

For microorganisms, cooperation rather than competition, is the key to survival

For microorganisms, cooperation rather than competition, is the key to survival

The University of Copenhagen reports: New microbial research at the Department of Biology reveals that bacteria would rather unite against external threats, such as antibiotics, rather than fight against each other. The report has just been published in the scientific publication ISME Journal. For a number of years the researchers have studied how combinations of bacteria behave together when in a confined area. After investigating many thousands of combinations it has become clear that bacteria cooperate to survive and that…

Read More Read More

Fast evolution explains the tiny stature of extinct ‘Hobbit’ from Flores Island

Fast evolution explains the tiny stature of extinct ‘Hobbit’ from Flores Island

An Indonesian island was home to H. Floresiensis – but how did the dwarfed human species evolve? areza taqwim/Shutterstock.com By José Alexandre Felizola Diniz-Filho, Universidade Federal de Goias and Pasquale Raia, University of Naples Federico II It’s not every day that scientists discover a new human species. But that’s just what happened back in 2004, when archaeologists uncovered some very well-preserved fossil remains in the Liang Bua cave on Flores Island, Indonesia. The diminutive size of this new human species,…

Read More Read More

Cell-bacteria mergers offer clues about how organelles evolved

Cell-bacteria mergers offer clues about how organelles evolved

Viviane Callier writes: There are few relationships in nature more intimate than those between cells and the symbiotic bacteria, or endosymbionts, that live inside them. In these partnerships, a host cell typically provides protection to its endosymbiont and gives it a way to propagate, while the endosymbiont provides key nutrients to the host. It’s a deeply cooperative arrangement, in which the genomes of the host and the endosymbiont even seem to contribute complementary pieces to each other’s metabolic and biosynthetic…

Read More Read More

Do human beings have an instinct for engaging in warfare?

Do human beings have an instinct for engaging in warfare?

David P Barash writes: The most serious problem with [the American anthropologist Napoleon] Chagnon’s influence on our understanding of human nature [through his study of the Yanomami people of the Venezuelan/Brazilian Amazon] is one familiar to many branches of science: generalising from one data set — however intensive — to a wider universe of phenomena. Academic psychologists, for example, are still reeling from a 2010 study by the University of British Columbia which found that the majority of psychological research…

Read More Read More

Where our minds go when words let us down

Where our minds go when words let us down

Kenneth S. Kosik writes: The drive to express ourselves can be joined with the sense that we cannot quite express ourselves fully, that language is inherently the limiting factor. Why should that be? Via a complex circuitry, the brain delivers motivation to the body as a motor command to execute its will. One view is the brain is busy making predictions about the world such as what we will see when we turn the corner. If we are surprised by…

Read More Read More

Complex birdsongs help biologists piece together the evolution of lifelong learning

Complex birdsongs help biologists piece together the evolution of lifelong learning

Vocal learning in birds is a lot like how people learn language. Alexandra Giese/Shutterstock.com By Cristina Robinson, Vanderbilt University; Kate Snyder, Vanderbilt University, and Nicole Creanza, Vanderbilt University Bonjour! Ni hao! Merhaba! If you move to a new country as an adult, you have to work much harder to get past that initial “hello” in the local language than if you’d moved as a child. Why does it take so much effort to learn a new language later in life?…

Read More Read More

Evolution doesn’t proceed in a straight line — so why draw it that way?

Evolution doesn’t proceed in a straight line — so why draw it that way?

Evolution has no final endpoint in mind. Uncle Leo/Shutterstock.com By Quentin Wheeler, State University of New York College of Environmental Science and Forestry; Antonio G. Valdecasas, CSIC – Consejo Superior de Investigaciones Científicas, and Cristina Cánovas, CSIC – Consejo Superior de Investigaciones Científicas A high school marching band’s T-shirt places a horn-playing Homo sapiens at the end of the evolutionary process. Brian Kloppenburg, Jordan Summers, Main Street Logo Evolution doesn’t follow a preordained, straight path. Yet images abound that suggest…

Read More Read More