Detecting alien life might be easier if we hunt for 'Jurassic worlds.' Here's why 

 "If they're out there, this analysis lets us figure out where they could be living." 

https://cdn.mos.cms.futurecdn.net/89y4CeU6fWx9TEhgktrwJR.jpg

https://www.space.com/dinosaur-era-earth-clues-search-for-alien-life