Lindsey Ellefson is Lifehacker’s Features Editor. She currently covers study and productivity hacks, as well as household and digital decluttering, and oversees the freelancers on the sex and ...

Discover research on memorization techniques for studying. Learn how repetition learning theory and spaced repetition boost ...

Semiotics is the study of nature and the role of signs in the world. It was developed by scholars such as Charles Peirce, Ferdinand de Saussure, and Yuri Lotman. Through these studies, it is ...