From NY Times: Deep in the heart of Texas, cows with fear­some horns are every­where — on bumper stickers and T-shirts, on the signs of auto deal­er­ships and chain restau­rants, grazing in broad pastures. The ubiq­ui­tous­ness of the long­horn, a symbol of the state and its flag­ship university’s mascot, might lead one to wonder: How did this animal get horns that can exceed seven feet across?

David M. Hillis, an evolu­tionary biol­o­gist at the Univer­sity of Texas at Austin, has the answer. · Go to Texas scien­tist with a thing for long­horns →