How does science define a year?

It's been a year since Joe Hanson took his fantastic science tumblr, It's Okay to be Smart, to YouTube. To celebrate, his latest episode takes a look at the ways humans experience years biologically, and how we define them astronomically. » 1/30/14 1:13pm 1/30/14 1:13pm

An Epic Assortment of Animal Superpowers

In the latest episode of It's Okay to be Smart, Joe Hanson takes a look at evolution's many (many, many) super-human solutions to the selective pressures of the natural world. If you've ever needed evidence of evolution's boundless creativity, look no further than this collection. » 8/09/13 10:32am 8/09/13 10:32am

Our ability to pay close attention is both a blessing and a curse

Sometimes paying close attention can cause us to overlook the seemingly obvious. Then again, if we couldn't focus our minds on a single task, we'd never get anything done. » 6/18/13 7:20am 6/18/13 7:20am

Why finding love is like finding alien intelligence

Current estimates put the number of stars in the Milky Way at well over 100 billion, each of which is thought to have at least one planet in its orbit. Assuming at least some of these planets have given rise to intelligent life capable of communicating with Earth, why haven't we heard from them yet? » 2/13/13 1:58pm 2/13/13 1:58pm

It's Carl Sagan's birthday! Time to party like the starstuff that we are.

Happy birthday, Carl Sagan! The legendary astronomer, astrophysicist, cosmologist and science educator would have been 78 today. To celebrate, we've rounded up a handful of our favorite Sagan posts and curated some stellar content from other websites that are honoring him today. Feel free to contribute in the comments! » 11/09/12 2:14pm 11/09/12 2:14pm