Guest Thinkers — September 2, 2009

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A weekly newsletter featuring the biggest ideas from the smartest people

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A weekly newsletter featuring the biggest ideas from the smartest people

The Future

Can humans purge the bots without sacrificing our privacy?

“Personhood” credentials could cleanse the internet of bots — but are the costs worth it?

A smartphone with a red case displays a world map on the screen, set against a vibrant orange background.

Health

Dr. AI will see you now

The integration of artificial intelligence into public health could have revolutionary implications for the global south—if only it can get online.

Poster for the 1939 New York World's Fair, featuring a stylized skyline, ocean liner, and the slogan "The World of Tomorrow," encapsulating future visions that captivate imaginations and inspire exploration.

The Future

The future in 1939: Microfilm and Elektro the Moto-Man

By looking back at future dreams we can see our current hopes and visions in a whole new light.

einstein general relativity curved spacetime

Starts With A Bang

The fabric of space is a Cheshire Cat

Most waves need a medium to travel through. But the way that light and gravitational waves travel shows that space can’t be a medium at all.

Diagram of atomic orbitals showing various shapes and labels, including s, p, d, and f orbitals, organized in a triangular structure with coordinate axes x, y, z.

Starts With A Bang

Why the number “1/137” appears everywhere in nature

One of the fundamental constants of nature, the fine-structure constant, determines so much about our Universe. Here’s why it matters.

Up Next

Politics & Current Affairs

The Virtual University–College On The Cheap

We’re constantly being told by magazines such as US News and World Report that there is a “College Crisis” and “Costs and Dropout Rates Keep Rising.” There is an easy solution.