People.
Some internet folk who I regularly learn from:
Hannah Ritchie - Amazing Datascientist focused on Climate Change communication & studies - https://twitter.com/_hannahritchie?lang=en
Saloni Dattani - Super interesting scientific summaries - https://www.scientificdiscovery.dev/
Jaryd Hermann - https://substack.com/@howtheygrow - does fantastic deep dives into product histories, growth etc
Andrej Karpathy - https://karpathy.ai/
Matt S Clancy - https://mattsclancy.com/