Monthly Archives: September 2022

Turnstile is Cloudflare’s latest attempt to rid the web of CAPTCHAs

Image: Cloudflare Cloudflare is testing a new kind of CAPTCHA that tests your browser instead of you. The company calls it Turnstile, and it’s designed to spare us from performing those mundane click-the-traffic-light kinds of tasks to verify you’re a human and not a bot. Turnstile is being presented as “a user-friendly, privacy preserving alternative”…

The asteroid that created Earth’s largest crater may have been way bigger than we thought

Two billion years ago, an impactor (most likely an asteroid) crashed into the Earth near present-day Johannesburg, South Africa, forming the largest and oldest known crater on Earth. NASA Earth Observatory image by Lauren Dauphin, using Landsat data from the U.S. Geological Survey. It’s a big week for asteroids, and not just because NASA’s DART…