Knowledge
A gateway to global information and frontier science. Exploring the tools and theories that expand the boundaries of human understanding.
Level 1
Project Gutenberg: a library of 75,000 free classic books online, made by volunteers
Project Gutenberg is a long running online library that gives free access to classic books in digital form. It focuses…
Learning multiple new skills can produce test scores comparable to adults 30 years younger
Older adults who learn multiple new skills simultaneously can achieve cognitive performance similar to adults 30 years younger. A UC Riverside study found that 3 months of intensive learning improved memory, attention, and cognitive control, with gains maintained up to one year later.
Level 2
PDFBooksWorld: free online reading of public domain books, downloads need a paid membership
PDFBooksWorld is a digital library and publisher that focuses on books in the public domain, which means works whose copyrights…
RefSeek: a Web search engine for students and researchers
Academic Resource Search. More than a billion sources: encyclopedia, monographies, magazines. RefSeek is a Web search engine made for students…
Stopping at a clear next step helps you finish work, as shown by classic psychology and a new “Hemingway effect”
Ernest Hemingway advised writers to stop when they are still going well and know what will happen next, so it…
Level 3
LHC experiments observe quantum entanglement in top quarks at the highest energies ever
The LHC has observed quantum entanglement in top quarks at record energies. This breakthrough allows physicists to test quantum reality and Bell inequalities.
Physics equations pattern suggests a simple meta-law
A new study claims a physics equations pattern follows a simple law. We explain the idea, how it differs from Zipf’s law, and what it means for AI search.
Physical laws may share a universal mathematical grammar
Could physical laws share a universal mathematical grammar? A new preprint finds a simple pattern in equations that could speed up AI equation discovery.
Most of humanity’s day is spent on ourselves
Scientists analyzed time-use surveys from more than 140 countries, covering about 87% of the world’s population, to build an “average…
NASA zodiac controversy: no, NASA didn’t change the zodiac
NASA zodiac controversy explained in plain language: NASA didn’t change zodiac signs; Ophiuchus is an old constellation and astronomy differs from astrology.