The Ask-an-Expert web sites below will allow you to communicate with experts in a wide range for fields to get answers to your really tough questions. Most of the sites have indexes of Frequently Asked Questions (FAQs), and it is always a good idea to search the FAQ database before submitting a question to see if your question has already been asked.
- Ask a Fresh Water Scientist - Fresh Water LIVE
- Ask an Earth Scientist -- University of Hawaii
- Ask a Mad Scientist -- Many different topics