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 ...

Time travel: reality or pure fantasy? We break down different time travel theories, ranking them from “scientifically possible” to “absolute nonsense.” Where do your favorite methods land? Trump ...

In Rev. Proc. 2025-23, the IRS on Monday provided a comprehensive, updated list of changes in tax accounting methods to which the automatic change procedures in Rev. Proc. 2015-13, as subsequently ...

I often save money on groceries for my family of six by shopping at Aldi each week. We love the price and taste of the Friendly Farms Greek yogurt, whole milk, and string cheese. I'll usually grab a ...

Helping your students see the possibilities of careers in STEM fields means providing them with new role models. Black History Month offers teachers more opportunities to feature the contributions of ...

If you’ve ever wanted to understand how failure is represented in source code, you’ve come to the right place. In addition to an overview of Java exceptions, this article gets you started with Java’s ...

Do you need to know how to sort Java objects in a collection, array, or map? Here's how to use the Comparable and Comparator interfaces and avoid ClassCastExceptions. Programmers frequently need to ...