| The Female Bird Song Project | | | There's a false notion that female birdsong is rare in comparison to male birdsong. But lady birds sing, too. You can participate in a new project that aims to collect more recordings of female birds. | | |
| 'Lost' asteroid to pass closely May 15 | | | Asteroid 2010 WC9 will pass at about half the moon's distance, in one of the closest approaches ever observed of an asteroid of this size. Click in for information about viewing online. | | |
| Fly over a Mars crater | | | Fly over Mars' Neukum Crater, in this 3-minute video based on images taken by ESA’s Mars Express spacecraft. | | |
| Find the Keystone in Hercules | | | The Keystone is a noticeable pattern of 4 stars in the constellation Hercules. The bright star Vega acts as your guide to finding it. | | |
