On the Galapagos Islands, where Charles Darwin’s observations led to his evolutionary theory, scientists are now reporting that they’re witnessing a single species splitting into two, according to a new paper in the Proceedings of the National Academy of Sciences.
A husband and wife team, Peter and Rosemary Grant of Princeton University, have spent the past 36 years studying Darwin’s finches, technically know as tanagers. Darwin’s observations of the birds during his voyage to the Galapagos on the HMS Beagle helped him arrive at the idea of evolutionary divergence: when different populations of a single species become geographically isolated, and evolve in different directions. The Grants have pushed that work further, with decades of painstaking observations providing a real-time record of evolution in action. In the PNAS paper, they describe something Darwin could only have dreamed of watching: the birth of a new species [Wired.com]. The process has been taking place with the help of a little bit of chance and a special song.
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A husband and wife team that for 35 years has researched finches’ evolutionary responses to environmental changes have won the prestigious Kyoto Prize in the basic sciences category. Peter and Rosemary Grant, both emeritus professors at Princeton University, have studied finches that lives on the Galapagos Islands for decades and will share the $515,000 prize. The Kyoto Prize is a Japanese award similar to the Nobel Prize.
The two evolutionary biologists devoted their careers to furthering Charles Darwin’s theory of evolution. Both 72, the Grants have been traveling regularly since 1973 to the Galápagos, the remote islands west of Ecuador. There, they have painstakingly recorded the characteristics of numerous varieties of finches [Philadelphia Inquirer]. Darwin stumbled upon these finches during his famous tour of the Galapagos Islands in 1835, later chronicled in his book The Voyage of the Beagle.
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A top official at Turkey’s science agency reportedly forced the editors of its science magazine to remove a cover story on the life and work of Charles Darwin in what appears to be a sign of the Turkish government’s official discomfort with the theory of evolution.
The article was stripped from the March issue of the widely read popular-science magazine Bilim ve Teknik (Science and Technology) just before it went to press. The magazine, which is published by Turkey’s research funding and science management organization, TÜBİTAK, also switched a planned cover picture of Darwin for an illustration relating to global warming [Nature News]. The editor of the magazine says she was removed from her post over the incident, but has declined to comment further as she’s still an employee of TUBITAK.
The March issue of the magazine, which was intented to celebrate Darwin’s 200th birthday, reached newsstands a week late and 16 pages short. Once the behind-the-scenes machinations became known, academics reacted with outrage. Turkish writer Ender Helvacıoğlu from Science and Future magazine called on the science community to react against this incident and pressure the government, who has the last word appointing the council’s scientific committee. “This intervention can’t be regarded as solely censorship. It connotes the states rejection of science” [Bianet], he wrote. Today a group of university professors were expected to gather at the science council’s headquarters to call for the resignation of the official who ordered the article removed.
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Some religious leaders may take issue with Charles Darwin and what he represents, but the Vatican has announced that it is officially on board with evolution. A leading official declared yesterday that Darwin’s theory of evolution was compatible with Christian faith, and could even be traced to St Augustine and St Thomas Aquinas. “In fact, what we mean by evolution is the world as created by God,” said Archbishop Gianfranco Ravasi [Times Online]. Both St. Augustine and Thomas Aquinas recognized that life changes slowly over time, Ravasi said, and that was a step towards comprehending evolution.
The Vatican’s effort to show that science is not incompatible with religion will culminate in a conference on evolution next month, organized to mark the 150th anniversary of Darwin’s landmark publication, On the Origin of Species. The Vatican has backed away slightly from its original proposal to completely ban discussion of intelligent design at the event, which organizers called “poor theology and poor science”. [Instead,] Intelligent Design would be discussed at the fringes of the conference at the Pontifical Gregorian University, but merely as a “cultural phenomenon”, rather than a scientific or theological issue, organisers said [Times Online].
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Charles Darwin’s theory of evolution may have been shaped by his abhorrence of slavery as much as by his keen observations of Galapagos finches, a new book argues. Darwin’s Sacred Cause, by Adrian Desmond and James Moore, notes that slavery propaganda of the time often claimed that different races belonged to different species, a notion that Darwin’s work obliterated. The book suggests that Darwin’s unique approach to evolution – relating all races and species by “common descent” – could have been fostered by his anti-slavery beliefs [BBC News]. Published to coincide with Darwin’s 200th birthday and the 150th anniversary of his publication of On the Origin of Species this year, the book is likely to stir up a new debate over Darwin’s motives.
Many members of Darwin’s extended family were deeply devoted to the abolitionist cause, including his grandfather, Josiah Wedgwood, who founded a chinaware company and produced cameos distributed by anti-slavery campaigners; the medallions bore the legend “Am I Not a Man and a Brother?” Darwin’s mother and wife were Wedgwoods and anti-slavery was what Darwin called a “sacred cause”. He was taught to see the oppressed black as a “brother”. This explains why, when he went to Edinburgh University at 16, he could apprentice himself to a freed Guyanese slave to learn the art of bird preservation without thinking it [beneath his dignity] [Times Online]. Darwin later described that former slave as one of his intimate friends.
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On the slopes of the Wolf volcano at the northern tip of one of the Galapagos Islands prowls a pink iguana, which until recently had entirely escaped the notice of the island’s visitors–including the eagle-eyed Charles Darwin. But now researchers have spotted the rosy reptile and declared it a new species, which diverged from the Galapagos’s other land iguana species about 5.7 million years ago. Says lead researcher Gabriele Gentile: “What’s surprising is that a new species of megafauna, like a large lizard, may still be [found] in a well-studied archipelago” [National Geographic News].
The creature was first noticed by park rangers on the island of Isabela in 1986, but researchers only began to study the animal in the last few years. A genetic analysis revealed that the pink iguana was quite distinct from the two known land iguana species, but the date of their genetic divergence poses a puzzle. “At 5.7 million years ago, all of the western islands of the archipelago did not exist,” said Gabriele Gentile…. “That’s a conundrum, because it’s now only inhabiting one part of Isabela that formed less than half a million years ago” [BBC News]. In fact, even the oldest parts of the current archipelago may be less than five million years old, researchers say. One possible explanation is that volcanoes that are now underwater may have been above the waves millions of years ago, allowing some marine iguanas to clamber onto those shores and begin evolving.
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Researchers may be able to recreate a species of giant tortoise that went extinct from the Galapagos Islands with a program of careful breeding. The new possibility hinges on the discovery that a species of giant tortoise living on the biggest island, Isabela, is very similar genetically to the extinct species, Geochelone elephantopus, which vanished from the island Floreana over a hundred years ago.
By mating Isabela tortoises that are most genetically similar to G. elephantopus, selecting the offspring that are most similar and mating those, through successive generations the species’ genetic makeup may be largely restored [The New York Times]. Says lead researcher Gisella Caccone: “We might need three or four generations to do this…. But in theory it could be done, and I think it’s pretty exciting to bring back from the dead a genome that we thought was gone” [BBC News].
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Almost 150 years since Charles Darwin published his ideas in The Origin of Species, a senior Anglican clergyman has written that the Church of England owes Darwin an apology for misunderstanding his theories of evolution. The church official, Reverend Malcolm Brown, was writing Monday on a church Web site launched to mark Darwin’s bicentenary next year. The Church of England says his statement reflects its position but does not constitute an official apology [AP].
The apology may be a bit late, but Brown wrote that it’s both relevant and necessary, as some religious groups continue to scoff at evolution. “Charles Darwin – 200 years from your birth (1809) the Church of England owes you an apology for misunderstanding you and, by getting our first reaction wrong, encouraging others to misunderstand you still,” he wrote on the Church of England website. “We try to practise the old virtues of ‘faith seeking understanding’ and hope that makes some amends” [The Independent].
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