After a compound bow failed him on a turkey hunt more than a decade ago, Michael Spink of Spink Wooden Bows in Pocahontas, Arkansas, started making his own wooden bows by hand. He walked us through the process of crafting a Native American longbow.
Water Power - Microhydro Electricity Basics: Pressurized, flowing water is a very dense resource, and hydro-electric systems convert a very large percentage of the available energy into electricity because the resource is captive in a pipe or flume.
Everyone might find himself in emergency situation under water somehow, what's better than wearing a life ring on wrist? Once you pull the bracelet when you are in danger, the slim bracelet will rapidly expand to a life ring to keep you afloat