Advances in cloning, stem cell manipulations, and sequencing DNA raise a profound possibility: we might be able to bring some species back from extinction. That’s the subject of my cover story for the April issue of National Geographic, which comes out today, and which you can read here.

This morning I spoke on Morning Edition on National Public Radio. The interview will be archived here.

Later today, I will be giving an introductory talk to an all-day exploration of “De-Exinction” at a TEDx meeting at the National Geographic Society. The talks will come from a remarkable line-up of cloning experts, conservation biologists, bioethicists, artists, and others. You can watch the live stream here, and in a few weeks all the videos will be posted online.

This is a fascinatingly complex subject–there are all sorts of questions about how de-extinction would work and about whether it’s a good idea or not. I’d like to invite everyone to post any questions they have from the article or meeting in the comment thread for this post. When I get back home, I will answer as many questions as I can and publish them in a post on Monday

Originally published March 15, 2013. Copyright 2013 Carl Zimmer.

Pretty much all the life you can see without the help of a microscope–toadstools, poplars, shortstops–is multicellular. Life began as single-celled microbes over 3.5 billion years ago. But at least 25 times over the course of the history of this planet, microbes have come together to form multicellular collectives–otherwise known as bodies.

These transitions are particularly intriguing to evolutionary biologists, because the nature of evolution itself changed along the way. If you’re a microbe, natural selection favors mutations that affect your nature as a single cell. If you stumble across a way to feed on a new nutrient, your descendants may grow faster than the competition and come to dominate your population. Single-celled microbes can evolve to be altruistic–even to commit suicide for the good of their fellow microbe–but they only do so to help their single-celled relatives.

Continue reading “Watching Bodies Evolve” →

Earlier this week, the Centers for Disease Control warned that we’re facing an onslaught of “nightmare bacteria”–a group of highly resistant, highly deadly microbes. Talk of the Nation, the National Public Radio Show, asked me to join them to talk about these bugs yesterday. You can listen to it here:

This is the sort of story that seems tailor-made for confusion, thanks to the squirrelly nature of microbiology. As my fellow guest on the show, NPR science correspondent Rob Stein, observed, we are not dealing with an out-of-control plague that will wipe out the planet. On the other hand, as I pointed out, these nightmare bacteria are killing people, and will probably kill more people in the future. I’m sure that listeners were left scratching their heads a bit. So I wanted to take a moment this snowy morning to explain the news at more length.

Continue reading “The “Nightmare Bacteria”: An Explainer” →

This is a story about the discovery of an organ that measures twelve feet long and four inches wide. You might well assume that this is old news. After all, how could something the size of a lamppost go unnoticed by anatomists? And yet, in fact, it’s only just come to light.

The discovery emerged out of a blood-drenched confusion. Alexander Werth, an anatomist, was standing on an ice sheet miles off the coast of Alaska’s North Slope. He was watching Inupiat whale hunters dismember bowhead whales they had caught in the Bering Sea. This government-sanctioned hunt is one of the best opportunities for whale anatomists to get hold of fresh tissue from the animals.

Continue reading “The Brain-Chilling, Shrimp-Caressing, Lamppost-Sized, NSFW Organ Hiding In A Whale’s Mouth” →

Alyssa writes, “I’m a wildlife biology student at UC Davis with a particular obsession with ornithology, as well as a strong love for the rich, diverse ecosystems we have along the coast of northern California. Somehow seeing Brown Pelicans flying by, their bizarre combination of obvious goofiness with an odd elegance never fails to put a smile on my face. I also appreciate that (offshore oil drilling problems aside), their population growth after ESA listing is about as close to a success story as we have in conservation. My tattoo is based of a painting by one of my heroes, John James Audubon. I asked the tattoo artist to darken the hind-neck and redden the gular pouch to reflect the characteristic breeding coloration the pacific subspecies, Pelecanus occidentalis californicus. I also asked for the foliage to be removed to better reflect the roosting habitat in California. The tattoo is by Chris Arredondo at Royal Peacock Tattoo Parlor in Sacramento, CA.”

You can see the rest of the Science Tattoo Emporium here and in Science Ink: Tattoos of the Science Obsessed.

And if you live in Connecticut, you’re invited to hear me speak at the Peabody Museum of Natural History at Yale University on Thursday at 5:30. Admission is free. (Poster here.)

Originally published March 3, 2013. Copyright 2013 Carl Zimmer.