Video: The chemistry of redheads

St. Patrick's Day evokes thoughts of all things often associated with the Irish—including red hair. Chemically speaking, what sets redheads apart from the crowd is pigmentation—specifically melanins.

Coffee: More biodiversity, better harvest

Bees, birds and bats make a huge contribution to the high yields produced by coffee farmers around Mount Kilimanjaro – an example of how biodiversity can pay off. This effect has been described as result of a study now ...

Mysterious insect to emerge in parts of Pennsylvania

(Phys.org) —One of the world's most mysterious insects is about to invade the skies over wooded areas in eastern Pennsylvania and other states, but an expert in Penn State's College of Agricultural Sciences says it's not ...

New frontier for scaling up online classes: credit

In 15 years of teaching, University of Pennsylvania classicist Peter Struck has guided perhaps a few hundred students annually in his classes on Greek and Roman mythology through the works of Homer, Sophocles, Aeschylus and ...

How plants counteract against the shade of larger neighbors

Plants that "lose the battle" during competitiveness for light because they are shaded by larger neighbours, counteract. They adapt by rapid shoot elongation and stretch their leaves towards the sun. The molecular basis of ...

New Study: Home Energy Savings Are Made in the Shade

(PhysOrg.com) -- Trees positioned to shade the west and south sides of a house may decrease summertime electric bills by 5 percent on average, according to a recent study of California homes by researchers from the National ...

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