Cadillac Sports Cars Aera lightweight Concept CarThis is the Cadillac Aera (Aero + Era) launches Cadillac's philosophy of "Art and Science" into new territory by taking an innovative and stylistic approach to ultra-light weight vehicle design. LOS ANGELES – The Cadillac Aera concept vehicle won the 2010 Los Angeles Auto Show Design Challenge, tying with Smart and besting entries from seven other