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


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

Watch videos

World Renowned Bloggers


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

Go to blogs

Big Think Edge


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

Most Near-Earth Objects Won't Get Here Anytime Soon

January 23, 2013, 9:00 AM

What's the Latest Development?

Donald Yeomans, manager of NASA's Near-Earth Object Program Office, recently gave a talk discussing his new book, which describes the latest efforts by scientists to find and track near-Earth objects (NEOs). He says that as of early 2012 a team consisting of both professional and amateur astronomers has located 8,800 asteroids and comets whose orbits come within approximately 150 million kilometers of Earth. Ninety percent of those whose diameters are larger than a kilometer have been found and their orbits projected at least a century ahead. Yeomans says that the findings demonstrate "with a very good deal of certainty that no asteroid or comet large enough to threaten life as we know it will hit Earth in the next 100 years."

What's the Big Idea?

Although impacts by NEOs are historically rare, they've caused catastrophic damage. The asteroid attributed with causing the extinction of dinosaurs and many other forms of surface life was 10 to 15 kilometers across, and created a crater 150 kilometers in diameter. Yeomans says that based on current data, any sizable future NEO headed towards Earth would be detected at least 50 years before arrival, giving humans plenty of time to defend the planet: "The reason the dinosaurs went extinct is because they didn’t have a space program."

Photo Credit: Shutterstock.com

Read it at Scientific American


Most Near-Earth Objects Won...

Newsletter: Share: