Ward and Brownlee are open to the idea of evolution on other planets that is not based on essential Earth-like characteristics (such as DNA and carbon).
Ward əd Brownlee aqalan ameran dǎɣ aniyat wan ƭiwaƭ fal tiyad ɗlanètetan winan eqel ayhan fal talɣiwen itbatnen dǎɣ Akal (sund ADN əd əarbone).