Volcanos
How Volcanoes Work - This site describes the science behind volcanoes using animation and images. Sponsored by NASA.
USGS Volcano Hazards Program - has weekly reports of current volcanic activity.
Ring of Fire| Hawaiian Volcano Observatory | Ring of Fire |
Typhoons, thunderstorms, and hurricanes
Perfect Disaster (Discovery Channel)
- An engaging website with historic disaster puzzles where visitors can piece together Pompeii and the mighty Maryland tornado from 1899 and enter a virtual tornado. Not for the faint of heart.
Botany (plants)
Flora of North America: This site is a
comprehensive collection of all North American species of plants. It provides names, synonyms, economic
uses, conservation status, and other information on each plant.
About.com Guide to Botany - Searchable site, or select information on different botany subjects.