"This column is about a man who changed the world, at least twice. I want to focus less on the impact of his work, which is all around us, and more on how he did it, because he’s a model of how you do social change."

Stewart Brand argues, "many extinct species—from the passenger pigeon to the woolly mammoth—might now be reclassified as "bodily, but not genetically, extinct." They're dead, but their DNA is recoverable from museum specimens and fossils, even those up to 200,000 years old."

"Throughout humankind's history, we've driven species after species extinct: the passenger pigeon, the Eastern cougar, the dodo ... But now, says Stewart Brand, we have the technology (and the biology) to bring back species that humanity wiped out. So -- should we? Which ones? He asks a big question whose answer is closer than you may think."

"A 1960’s counterculture icon who brought new ideas like computers and solar power into the American mainstream through The Whole Earth Catalogue is now on a new mission: turning back time. Stewart Brand’s team of biologists at Revive and Restore is building a tool kit for genetic restoration that would allow the rebirth of species that have long since disappeared — like the woolly mammoth — while also reversing the extinction process underway in many of our ecosystems. How is this genetic magic possible, and what implications does it have for our planet?"

"Stewart Brand is a futurist, counterculturist and visionary with a very wide-ranging mind. In conversation with TED Curator Chris Anderson, Brand discusses ... just about everything: human nature, bringing back the wooly mammoth, geoengineering, rewilding and science as organized skepticism -- plus the story of an acid trip on a San Francisco rooftop in the '60s that sparked a perspective-shifting idea. 'The story we're told is that we're the next meteor,' Brand says, but 'things are capable of getting better.'"

An interview conducted by Stewart Brand with Beth Shapiro about de-extinction science and the fate of the woolly mammoth. 

Stewart Brand argues, "death is still forever, but extinction may not be."

"With advances in genetic technology, we may someday be able to restore long-gone species like the woolly mammoth and the passenger pigeon. It’s a goal worth pursuing, with real benefits for conservation and our sense of the natural world."

An interview with Wired's Maria Streshinsky and Stewart Brand. 

"Or so Revive & Restore, a project of the Stewart Brand’s California-based non-profit Long Now Foundation, likes to think. The group is creating a movement around de-extinction, and is taking the lead on efforts to bring back the passenger pigeon while helping out on other ongoing efforts to restore other extinct species including European aurochs, Pyrenean ibexes, American chestnut trees, Tasmanian tigers, California condors, even wooly mammoths."

"Stewart Brand was at the heart of 60s counterculture and is now widely revered as the tech visionary whose book anticipated the web. We meet the man for whom big ideas are a way of life."

Ben Mezrich and George Church discuss woolly mammoths. 

George Church discusses de-extinction at TEDxDeExtinction.

"The Harvard Woolly Mammoth Revival team headed by George Church (the Church Lab) is working to identify cold climate adapted alleles of the mammoth genome and edit them into living elephant cells. From there, scientists will study the expression of Woolly Mammoth mutations to test predictions about gene function."

"Harvard University’s George Church is a molecular geneticist, whose roster of achievements includes assisting the development of DNA sequencing, heading the race to edit the human genome, and pioneering the effort to bring back extinct creatures such as the woolly mammoth. We have a duty to put these technologies to work, he tells Michael Brooks"

"Over the course of his 30-plus-year career, George Church has pioneered several transformative fields in medicine, including genomic sequencing, synthetic biology, and, most recently, genome engineering. In this One-on-One, Medscape Editor-in-Chief Eric Topol talked with Dr Church about CRISPR, editing embryos, and bringing back the woolly mammoth."

“That may be true, he admits. But he says people should acknowledge that 1) nothing anyone does is without risk, and 2) doing nothing also entails risk. 'There's a dark side to every technology,' he argues. Cars kill 33,000 people a year in the United States, but that doesn't discourage people from driving or riding in cars. 'New technologies always have a higher ratio of scary stories associated with them because they're still unknown.' Making a new technology safe and effective doesn't mean making it perfectly safe and perfectly effective, he adds. 'It means making it safer and more effective than whatever else is out there.'"

"Religious leaders and bioethicists have debated genome editing for decades, but it’s largely been a theoretical consideration. CRISPR makes once-theoretical notions — say, editing the genomes of embryos — a very real possibility. (Those changes are called “germline” edits and would be passed on to future generations.) It’s a revolution that’s being driven by scientists like Wu’s husband, famed geneticist and her Harvard Medical School colleague George Church."