What is Big Think?  

We are Big Idea Hunters…

We live in a time of information abundance, which far too many of us see as information overload. With the sum total of human knowledge, past and present, at our fingertips, we’re faced with a crisis of attention: which ideas should we engage with, and why? Big Think is an evolving roadmap to the best thinking on the planet — the ideas that can help you think flexibly and act decisively in a multivariate world.

A word about Big Ideas and Themes — The architecture of Big Think

Big ideas are lenses for envisioning the future. Every article and video on bigthink.com and on our learning platforms is based on an emerging “big idea” that is significant, widely relevant, and actionable. We’re sifting the noise for the questions and insights that have the power to change all of our lives, for decades to come. For example, reverse-engineering is a big idea in that the concept is increasingly useful across multiple disciplines, from education to nanotechnology.

Themes are the seven broad umbrellas under which we organize the hundreds of big ideas that populate Big Think. They include New World Order, Earth and Beyond, 21st Century Living, Going Mental, Extreme Biology, Power and Influence, and Inventing the Future.

Big Think Features:

12,000+ Expert Videos

1

Browse videos featuring experts across a wide range of disciplines, from personal health to business leadership to neuroscience.

Watch videos

World Renowned Bloggers

2

Big Think’s contributors offer expert analysis of the big ideas behind the news.

Go to blogs

Big Think Edge

3

Big Think’s Edge learning platform for career mentorship and professional development provides engaging and actionable courses delivered by the people who are shaping our future.

Find out more
Close

Earth's Magnetic Field Long Overdue For A Flip

October 3, 2012, 10:28 PM
Shutterstock_57943174

Article written by guest writer Kecia Lynn

What's the Latest Development?

Next month the European Space Agency plans to launch three satellites into orbit, and the data collected from them will give scientists insights into the state of the magnetic field, which they fear could come close to disappearing in less than 500 years, prior to reversing itself completely. As it stands today, the field has been thinning over the last 150 years, and ongoing changes will affect everything from drilling to GPS systems to animals' ability to navigate.

What's the Big Idea?

It's not as though the magnetic field hasn't reversed before. "[T]he geological record suggests the magnetic field has reversed every 250,000 years, meaning that, with the last event 800,000 years ago, another would seem to be overdue." Unlike Mars, which lost its magnetic field billions of years ago, Earth's field has always managed to restore itself. Advances in scientific understanding are already helping to clear up some of the mysteries behind why and how the magnetic field flips, but "there are significant holes" that need filling.

Photo Credit: Shutterstock.com

 

Earth's Magnetic Field Long...

Newsletter: Share: