On this day in 2009: Brian Acton was turned down for a job at Facebook.
So started his own business.
He called it WhatsApp.
5 years later, he sold it to Facebook for $19 billion.
I genuinely don't understand why everyone isn't using this yet
Andrej Karpathy, a co-founder of OpenAI, posted a simple idea that hit 16 million views: stop using AI to write code, use it to build a second brain.
You point Claude Code at a folder, drop in any source, an article, a transcript, a PDF, and Claude reads it, links it, and files it into a living wiki of everything you know. It compounds like interest, the more you feed it, the smarter it gets.
Here's the whole thing:
> Install Obsidian, create a vault, open it in Claude Code
> Paste Karpathy's wiki idea file and tell Claude to build it
> Claude makes three folders: raw for sources, wiki for its pages, a CLAUDE.md that runs it
> Drop any source into raw and say "ingest this"
> Ask questions across everything, forever
Five minutes to set up, and you never start from a blank chat again.
Full step-by-step guide with Claude and Obsidian, link below.
Bookmark this
Nikola Tesla featured in The New York Press, December 7, 1909.
In this article, Tesla described a future where people could communicate wirelessly across the world and stay connected with aircraft in flight. At the time, these ideas seemed far-fetched. More than a century later, much of what he envisioned has become reality.
Source: The New York Press, December 7, 1909