Learn Cyber Threat Intelligence (CTI), threat hunting, and MITRE ATT&CK framework to strengthen your defenses. Real-world APT case studies and understanding attacker TTPs used in modern cyber threats.

Discover how Udemy makes money, its different segments, instructor payouts, revenue growth, margins, and more.

Here are the best online courses and resources to learn Lisp and its most popular dialects: Common Lisp, Scheme, Racket, and Emacs Lisp.

Update (April 2026): On April 9, shareholders of both companies voted overwhelmingly to approve the merger — 99.4%% at Coursera, 99.9%% at Udemy. The deal is expected to close in the second half of 2026. I also dug into the 300-page merger prospectus and found that Coursera approached Udemy three times over two years before getting a yes, and that Pluralsight’s owner made a competing cash offer. Read the full merger history. TL;DR Coursera is acquiring Udemy in an all-stock deal worth ~$1.8 b

TL;DR Duolingo is targeting 100 million DAUs by 2028. It took the company 13 years to get its first 50 million DAUs. The new strategy includes more AI features for free users, deeper language courses, and growth of Chess, Math, and Music. But the strategy sacrifices short-term growth for long-term results, and von Ahn is calling 2026 its investment year without significant results.   It took Duolingo 13 years to get 50 million DAUs. CEO Luis von Ahn wants to double it in three years. For yea

In today’s data-driven world, Geographic Information Systems (GIS) play a crucial role in analyzing and interpreting spatial information. GIS is a powerful tool that allows professionals in various fields (environmental science, urban planning, and business) to visualize, interpret, and make informed decisions based on geographical data. Whether you’re a geographer, urban planner, environmental scientist, or someone interested in leveraging spatial data, acquiring proficiency in GIS can open n