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
Introspection provides our most direct contact with physical reality
Some authors argue introspection is our least sensory-mediated access to experience. But introspective reports are not direct neural measurement, and they can be unreliable.
Why Western astrology uses 12 signs even though the sky has 13 constellations
Why tropical astrology adheres to 12 signs, like Aries and Pisces, even though astronomers have identified 13 constellations (including Ophiuchus) on the ecliptic.
BASE: search millions of free academic papers in one place
BASE is a scholarly search engine run by Bielefeld University Library. It gathers records from university repositories and other trusted…
Open Library: a free online library that lets you borrow books like a real library
Open Library is a public, open catalog run by the Internet Archive. Its goal is simple, one web page for…
Goodreads: choose what to read next with help from friends
Goodreads is a large, free website made for people who read books. Its goal is simple, to help readers discover…
Free-eBooks.net: get free books (with a VIP plan for unlimited downloads)
Free-eBooks.net is a digital library for free reading. It hosts fiction, non fiction, academic titles, textbooks and classic literature. Readers…
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.