Science says time travel is possible, but probably not in the way you're thinking. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Is time travel ...

In this survey, we argue that the economic analysis of fertility has entered a new era. First-generation models of fertility choice were designed to account for two empirical regularities that, in the ...

Souls, spirits, ghosts, gods, demons, angels, aliens, intelligent designers, government conspirators, and all manner of invisible agents with power and intention are believed to haunt our world and ...