Criminals always leave traces behind after a crime is committed. In fact, footprints, tire tracks and tool marks are often more prevalent than fingerprints at a crime scene. What can impression evidence tell an investigator?
Imagine walking through a field and stumbling upon scads of corpses, all in various states of decomposition. It's not the setting for your next nightmare, but rather a very real discipline of forensic anthropology.
One of the most influential ideas in forensic science history is known as Locard's exchange principle. This simple, yet groundbreaking idea forever changed the way we fight crime. But who was Edmond Locard, anyway?
Will your favorite criminal drama feature investigators packing calculators instead of heat? Probably not. However, forensic accountants help investigate criminal and civil cases involving financial issues like fraud.
When you speak, a stream of air flows up your trachea from your lungs. And when you add helium, your voice rises several octaves. So if you filled the air with helium, just how high would your voice get?
The detonation of the world's first nuclear bomb ushered in the atomic age. It also amplified tensions between countries and sparked an era in which nations scrambled for power and seemed headed toward catastrophe.
A group of scientists from Duke University have demonstrated a simplified cloaking device. Learn about the cloaking device that the Duke scientists created and find out if a real-life cloaking device is actually possible.
If you want to see a hologram, you don't have to look much farther than your wallet. But the most impressive holograms are large scale and illuminated with lasers or displayed in a darkened room with carefully directed lighting. Learn how a hologram, light and your brain work together make clear, 3-D images.
The idea that something so intangible can lift objects can seem unbelievable, but it's a real phenomenon. Learn how acoustic levitation takes advantage of the properties of sound to cause solids, liquids and heavy gases to float.