Penn researchers grow liquid crystal 'flowers' that can be used as lenses

A team of material scientists, chemical engineers and physicists from the University of Pennsylvania has made another advance in their effort to use liquid crystals as a medium for assembling structures.

Ecofriendly method extracts oil from sand

A new technique can extract oil from fouled beaches, and is also a more environmentally friendly way of exploiting tar sands, says a  team of researchers at Penn State University.