Listening is a more natural way of learning, when compared to reading. Written language only began at around 3200 BC, but spoken language has existed long ago.
Learning by listening is a great way to: - increases imagination and understanding - improves your listening skills - improves your own spoken accent - learn while on the move - reduce eye strain
Now learn the vast amount of general knowledge available on Wikipedia through audio (audio article). You could even learn subconsciously by playing the audio while you are sleeping! If you are planning to listen a lot, you could try using a bone conduction headphone, or a standard speaker instead of an earphone.
"The only true wisdom is in knowing you know nothing." - Socrates
SUMMARY ======= A research group led by Raphael Mechoulam at Hebrew University has synthesized many cannabinoids. Some of those are:
HU-210 — a high affinity CB1 agonist (Ki = 0.23 nM) HU-211 — the (+)-enantiomer of HU-210 with dramatically reduced CB1 affinity HU-239 — also known as ajulemic acid HU-243 HU-308 HU-320 HU-331 HU-336 HU-345