The idea sounds like pure science fiction: a giant cannon that hurls satellites toward orbit at 28,400 km/h, using raw kinetic energy instead of towering rockets. Yet a new generation of space ...

Discover a fast and powerful calculus-based method for finding square roots with impressive accuracy. This explanation shows how derivatives and iterative approximation can be used to quickly zero in ...

James Chen, CMT is an expert trader, investment adviser, and global market strategist. Amy is an ACA and the CEO and founder of OnPoint Learning, a financial training company delivering training to ...

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

Paying off debts is one of the most important steps in improving your financial life. How you approach it, though, comes down to your personality. If you're someone who needs a quick win right off the ...

What is a hermit crab? There are over 800 species of hermit crabs worldwide, and almost all are ocean dwellers—though people are likely most familiar with the dozen semi-terrestrial species, called ...

The continent’s ice is melting and raising sea levels worldwide. Our journalists will be sending regular dispatches as they head there with scientists trying to gauge the dangers. By Raymond Zhong and ...