1. The discovery of water on Mars.

2. Pieter van den Hoogenband

3. The blog

4. John Kerry & George Bush

5. Sudan

6. Six

7. The bombings on the trains in Madrid

8. Hurricane

9. Marlon Brando

10. Beslan, Russia

11. Microsoft made peace with its long-time rival, Sun Microsystems

12. Yasir Arafat

13. The Scream

14. 10, 25

15. She won the women's Olympic marathon

16. Indonesia.

17. Ukraine

18. The tsunami in the Pacific ocean.