×☰

Subscribe
Monitor Daily Current Issue
Home
World ⌃ ⌃
USA ⌃ ⌃
- All USA
- Politics
- Foreign Policy
- Military
- Justice
- Education
- Society
Commentary ⌃ ⌃
Economy
Science & Nature ⌃ ⌃
Culture ⌃ ⌃
- All Culture
- Arts
- Music
- Movies
- TV
- In a Word
- The Home Forum
- Family
- Food
Books ⌃ ⌃
- All Books
- Book Reviews
Podcasts ⌃ ⌃
- Monitor Daily
- Perception Gaps
Photos of the Week

On the horizon

News from the natural world.

By Peter N. Spotts

March 2, 2006

Related stories