Master pendulum dynamics with **“Solve Ball Swinging Problems With Two Strings Like A Pro.”** This tutorial walks you step by step through analyzing and solving problems involving a ball suspended by ...

You have a sharp brain if you can solve this math puzzle. Test your problem-solving skills and intelligence now! Math puzzles test readers' critical thinking skills by challenging them to solve ...

President Donald Trump, in a brief phone call with POLITICO, cast himself as the savior for a United Nations in danger of financial collapse, touting his ability to get members to pay unpaid dues. But ...

The most recent TIMSS assessment underscores the seriousness of our problem. Canadian Grade 4 students performed below both U.S. students and the international median at nearly every math benchmark ...

When my cofounder and I were accepted into a competitive startup accelerator program in fall 2025, we applied with an ambitious idea: to build an “AI scientist” for machine learning research. What ...

Not enough media or political attention is given to grave hunger crises in the Global South, according to analysts. Reports also say far more is spent on weapons than food relief.

Five years ago, mathematicians Dawei Chen and Quentin Gendron were trying to untangle a difficult area of algebraic geometry involving differentials, elements of calculus used to measure distance ...

Tesla CEO Elon Musk has repeated his warnings about America’s debt. The tech billionaire has predicted that financial trouble is inevitable without the transformative effects of AI and robotics on the ...

Recently, two of the most popular podcasters in the world sat down to discuss an issue currently preoccupying demographers around the world: what is to be done about declining birth rates. The Diary ...

Getting LeetCode onto your PC can make practicing coding problems a lot smoother. While there isn’t an official LeetCode app ...

I pushed eight free AI chatbots to their limits to find the best AI chatbots of 2026. To explore our top picks, check out ZDNET's chatbot-by-chatbot guide.