A soldier returned from the Sahara desert in 1916 with a wild story about a meteorite that dwarfed all others. Over 100 years ...

Here you will find videos and activities about the Stone Age. Try them out, and then test your knowledge with a short quiz before exploring the rest of the collection. Narrator: Excuse me. Yes, you.

Abstract: One of the main objectives of this research work is to improve the accuracy of the medical image of the gallbladder obtained from the ultrasound medical diagnostic apparatus by digital ...