Aliens may not actually resemble the little green creatures Hollywood loves to portray them as. Rather, they are more likely to look like 'giant jellyfish with orange bottoms', if a leading British space scientist is to be believed.

"My vision of aliens is an inhuman, silicon-based life form that looks much more like a jellyfish than sci-fi's little green men. It is likely that there is extra-terrestriallife - it is just more alien than you'd imagine," Maggie Aderin-Pocock, satellite expert and government adviser in UK, said. 

As against the little green men so beloved of Hollywood directors, they may look like football-field sized jellyfish,complete with onion-shaped appendages and an orange underbellyor bottom, the Daily Mail reported quoting the scientist.