A look at this week's top-rated websites from StumbleUpon, recorded on November 6.
This week's selection includes a website that shows you how a secret knock-detecting lock works, a website that shows how clever dolphins are, a website featuring an article about beauty and perception, a website showing how to make a caramel Apple Cheesecake Pie and a website that hosts the best Photoshop tutorials for July 2009.
1. Made by Steve Hoefer
2. Deep thinkers | Science | The Guardian
3. Perception & Bits Of Wisdom
4. Caramel Apple Cheesecake Pie & Annie's Eats
5. Tutorial Magazine - 32 Best Photoshop Tutorials of July...