The artificial intelligence startup Perplexity announced today it is making Comet, its AI-powered search engine, free for all users worldwide.

Google Chrome is testing new Tall and Compact search box layouts on the New Tab Page, with smart prompts for planning, learning, and more.

The push to reduce spending on foundational research is shortsighted, Tesla A. Monson and Marianne F. Brasil write.

The border wall built during the Trump administration now stands along roughly 190 miles of Arizona's border with Mexico. • It's 30 feet tall in most places. • Its steel bollards are six inches wide ...

Upgrading to United's economy class gives you the option to change your flight, bring a carry-on and more. Many or all of the products on this page are from partners who compensate us when you click ...