The History of Alchemy

Lawrence Principe of Johns Hopkins University wants to rehabilitate alchemy. He believes that most alchemists were respectable knowledge seekers working with well constructed theories.

If today we associate "alchemist" with "charlatan", it is because history has given the study of alchemy a bad rap: "The most famous alchemical pursuit, chrysopoeia (the transmutation of base metals into gold), was viewed with a mixture of greed and terror by the political authorities of the time. Such knowledge might bring enormous wealth to those who had it, but it had the ability to destroy the currency. Many countries passed laws forbidding the transmutation of metals, even as their kings secretly patronised alchemy hoping to gain an advantage over other monarchs."

'Upstreamism': Your zip code affects your health as much as genetics

Upstreamism advocate Rishi Manchanda calls us to understand health not as a "personal responsibility" but a "common good."

Sponsored by Northwell Health
  • Upstreamism tasks health care professionals to combat unhealthy social and cultural influences that exist outside — or upstream — of medical facilities.
  • Patients from low-income neighborhoods are most at risk of negative health impacts.
  • Thankfully, health care professionals are not alone. Upstreamism is increasingly part of our cultural consciousness.
Keep reading Show less
Videos
  • Oumuamua, a quarter-mile long asteroid tumbling through space, is Hawaiian for "scout", or "the first of many".
  • It was given this name because it came from another solar system.
  • Some claimed Oumuamua was an alien technology, but there's no actual evidence for that.

Banned books: 10 of the most-challenged books in America

America isn't immune to attempts to remove books from libraries and schools, here are ten frequent targets and why you ought to go check them out.

Nazis burn books on a huge bonfire of 'anti-German' literature in the Opernplatz, Berlin. (Photo by Keystone/Getty Images)
Culture & Religion
  • Even in America, books are frequently challenged and removed from schools and public libraries.
  • Every year, the American Library Association puts on Banned Books Week to draw attention to this fact.
  • Some of the books they include on their list of most frequently challenged are some of the greatest, most beloved, and entertaining books there are.
Keep reading Show less
Big Think
Sponsored by Lumina Foundation

Upvote the video, or videos, you want to win.

As you vote, keep in mind that we are looking for a winner with the most engaging social venture pitch - an idea you would want to invest in. And note: We'll only count upvotes (not downvotes).

Keep reading Show less