Category: Articles
Evolution: Education and Outreach, March 17, 2010
Journalists have been writing about evolution since Darwin first published the Origin of Species. Today, news about evolution comes in a dizzying diversity of venues. In this paper, I survey this diversity, observing its strengths and weaknesses for helping students learn about evolution.
The New York Times, March 15, 2010
The word “phocomelia” means seal limb. It describes an extremely rare condition in which babies are born with limbs that look like flippers.
The long bones of the arms fail to develop, but fingers sometimes sprout from the shoulders. In some cases, the legs fail to develop, too. The French anatomist Étienne Geoffroy Saint-Hilaire coined the word in 1836, and it immediately sank into scientific obscurity for 120 years. And then, 50 years ago, it suddenly became all too familiar.
Continue reading “Answers Begin to Emerge on How Thalidomide Caused Defects”
Yale Environment 360, February 15, 2010
The JOIDES Resolution looks like a bizarre hybrid of an oil rig and a cargo ship. It is, in fact, a research vessel that ocean scientists use to dig up sediment from the sea floor. In 2003, on a voyage to the southeastern Atlantic, scientists aboard the JOIDES Resolution brought up a particularly striking haul.
They had drilled down into sediment that had formed on the sea floor over the course of millions of years. The oldest sediment in the drill was white. It had been formed by the calcium carbonate shells of single-celled organisms — the same kind of material that makes up the White Cliffs of Dover. But when the scientists examined the sediment that had formed 55 million years ago, the color changed in a geological blink of an eye.
Continue reading “An Ominous Warning on the Effects of Ocean Acidification”
Discover, February 15, 2010
Any halfway decent thesaurus will provide a long list of synonyms for fear, and yet they are not very good substitutes. No one would confuse having the creeps with being terrified. It is strange that we have so many words for fear, when fear is such a unitary, primal feeling. Perhaps all those synonyms are just linguistic inventions. Perhaps, if we looked inside our brains, we would just find plain old fear.
That is certainly how things seemed in the early 1900s, when scientists began studying how we come to be scared of things. They built on Ivan Pavlov’s classic experiments on dogs, in which Pavlov would ring a bell before giving his dogs food. Eventually they learned to associate the bell with food and began to salivate in anticipation.
Continue reading “The Primitive, Complicated, Essential Emotion Called Fear”
The New York Times, February 4, 2010
Until last week, paleontologists could offer no clear-cut evidence for the color of dinosaurs. Then researchers provided evidence that a dinosaur called Sinosauropteryx had a white-and-ginger striped tail. And now a team of paleontologists has published a full-body portrait of another dinosaur, in striking plumage that would have delighted that great painter of birds John James Audubon.
“This is actual science, not ‘Avatar,’ ” said Richard O. Prum, an evolutionary biologist at Yale and co-author of the new study, published in Science.