Twitter is without a doubt the best way to share and discover what is happening right now.

Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with fr...

Visit Rebreather World forum, the next step in scuba diving, and where all the top rebreather divers hang out. Scuba diving longer, deeper, less gas.

Nano4Life - Nanotechnology Specialists enhancing existing products to all surfaces to provide unique properties such as waterproofing, sealing, protec...

Flickr is almost certainly the best online photo management and sharing application in the world. Show off your favorite photos and videos to the worl...

from News-Medical.Net - Latest Medical News and Research from Around the World

Το blog ασχολείται με τη φύση και όλους τους τομείς της βιολογίας

Diigo is a powerful research tool and a knowledge-sharing community