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Evolutionary biologist Menno Schilthuizen releases new book; to speak at Academy of Natural Sciences

Check any biology textbook for an example of evolution through natural selection, and you’re pretty much guaranteed to read about the finches of the Galapagos Islands. Some have smaller beaks ideal for eating insects. Others have sturdier beaks that crack seeds. As Charles Darwin realized when he visited the Galapagos, all are descended from colonists

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The River Wild

by Bernard Brown
I waded in from a rocky bank in the mountains of Schuylkill County and quickly forgot what I was looking for. My plan on that hot afternoon had been to snorkel for turtles, a pursuit that involves actively investigating underwater boulders and snags. Instead, I watched the fish and rocks on the bottom

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Smart Water

Two Penn grads quench your thirst and address the global water crisis by danielle zimmerman
In Philadelphia, you can fill a glass with the flick of a faucet, or instantly run a warm bath to relax from a particularly rough day. But for people living in other parts of the world, those simple actions are still

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2 mins read
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Found Food: Spring

I had never realized the dearth of earth tones in my wardrobe. Casey Spacht, director of Lancaster Farm Fresh Co-op and my guide for a day of foraging in Lancaster County, closed his last logistical planning email thusly: “p.s. wear camo......just playing... but would be good. greens, browns.”

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Film: No Impact Man

No Impact Man(2009)
Back in 2007, Colin Beavan (a.k.a. No Impact Man) had his 15 minutes—sitting for television interviews, being bandied about on blogs and earning a feature in The New York Times. (His book was reviewed in Grid’s October 2009 issue.) Along with his wife and daughter, Beavan attempted to live for one year in

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News: Tree Trim

Fairmount Park cuts down trees to make way for meadowby Cassie CumminsUsually when you hear about someone cutting down trees, it’s a bad thing. Not in this case: Fairmount Park’s Houston Meadow Reclamation and Management Plan is using the systematic removal of trees to restore a valued ecosystem, and return breeding birds to a beloved

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1 min read
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