Membership

When Was the Last Time This Happened?

Today’s date is 4/5/2013–all different digits. When was the last time this happened?

by

Daniel Honan

April 5, 2013

Get the Big Think newsletter on Substack

Today’s date is 4/5/2013–all different digits. When was the last time this happened?

Daniel Honan

Former Managing Editor, Big Think

Full Profile

Monthly Issue April 2026

The Energy Transition

In this monthly issue, we examine how our understanding of energy — and how we source and use it — is evolving.

1 video 11 articles

Two hands surround a glowing, illustrated sun with a human face, against a green background with radiating lines.

Featured Classes

A stylized image shows three overlapping ovals in white, pink, and brown, with a halftone portrait of a person partially visible in the bottom oval, on a light mauve background.

Members

5 videos

The Mindful Advantage

Rasmus Hougaard

Author, Speaker and Managing Partner, Potential Project

Related Content

Starts With A Bang

Ask Ethan: What’s the biggest misconception in astronomy?

Many facts are well-known to professionals, but are unappreciated or even rejected outright by the public. "How stars work" takes the cake.

by Ethan Siegel

A colorful nebula with a bright center and symmetrical, wing-like clouds of gas and dust extends outward in space, as seen in a JWST reveal that uncovers stars and galaxies in the universe beyond.

Mini Philosophy

5 ways ancient Persia shaped our modern world

From landscaped gardens to road systems, the Persians were among the first to create many things we still enjoy today.

by Jonny Thomson

a painting of a group of men standing next to each other.

Books

Elon Musk, SpaceX, and the rise of “sovereignty as a service”

As SpaceX slashes launch costs, governments are gaining new capabilities, while potentially outsourcing their sovereignty to Musk's private empire.

by Quinn Slobodian & Ben Tarnoff

The left side reads "an excerpt from" on a light green background; the right displays the "Muskism: A Guide for the Perplexed" book cover, featuring white smoke rising against a blue sky.

Starts With A Bang

The idea of “theories of everything” may be fundamentally wrong

For decades, theorists have been cooking up "theories of everything" to explain our Universe. Are all of them completely off-track?

by Ethan Siegel

Learn from the world's biggest thinkers.

Philosophy

Science & Tech

Mind & Behavior

Business

History & Society

Philosophy

Science & Tech

Mind & Behavior

Business

History & Society

When Was the Last Time This Happened?

Today’s date is 4/5/2013–all different digits. When was the last time this happened?

The Energy Transition

When Was the Last Time This Happened?

Philosophy

Science & Tech

Mind & Behavior

Business

History & Society

When Was the Last Time This Happened?

Today’s date is 4/5/2013–all different digits. When was the last time this happened?

Feed your curiosity

Related Content