I'm sure you all at least once listened to the Virtual Barber shop audio clip. If not, you should immediately. As a child it fascinated me. It is a binaural audio clip originally created in 1996. It gave me chills when the barber started cutting hair. Not even for a moment I felt it's not real. But how does it work? It is due to binaural hearing. It helps our brain to detect the direction of a sound. When making binaural recordings a two track digital recording device is attached to two microphones that are mounted on a dummy head equivalent to a human head. The recordings are so realistic that some people even claimed they smell sulfur if someone strikes a match in an audio clip. If you haven't listened to a binaural audio clip now is the time to enjoy. And if you are a fan of these clips let me know the best one you listened to so far.

Until January 1987 scientists believed that different groups of humans evolved in different regions separately. A groundbreaking study done by Rebecca Cann, Mark Stoneking, and Allan Wilson revealed that we all have a common ancestor. In other words we all have the same great great great great great.......................................... great grandmother who lived in Africa about 200,000 years ago and she is named as the "Mitochondrial Eve". But unlike her biblical namesake she was not the only woman in the world back then. There were other women but only her lineage survived. But what exactly is Mitochondrial eve and how do scientists claim that we all are related?

Having your very own nuclear lab at home sounds pretty awesome, right? Well kids in 1950s had this opportunity when the famous American toy-maker, Alfred Carlton Gilbert decided to introduce a toy kit containing not only actual radioisotopes but also equipment to detect radiation.The kit was sold for 49.50$ in 1950 and it contained a battery powered GM counter, electroscope,spinthariscope, a wilson cloud  chamber with a Polonium source,four glass jars containing natural uranium bearing ores (autunite,torbenite,uraninite and carnotite), low level radiation sources (Pb-210, Ru-106, Zn-65), nuclear spheres to make a model of an alpha particle and three C batteries.