Top 15 websites in science

According to the Internet watcher, eBizMBA.com, the 15 science websites that receive the most monthly visits are:

1 – howstuffworks

2 – NOAA (National Oceanic and Atmospheric Administration, U.S.)

3 – Discovery

4 – NASA

5 – ScienceDirect

6 – ScienceDaily

7 – Nature

8 – Treehugger

9 – PopSci

10 – ScienceBlogs

11 – PhysOrg

12 – NewScientist

13 – LiveScience

14 – Space

15 – RedOrbit

Have you visited any of these sites?  What is your favourite science website?