Born in Bombay (now Mumbai) in 1865 to British parents, Joseph Rudyard Kipling lived in India until the age of six. When, after a period of study in England, he returned to India, he worked as a writer and editor for a newspaper. Later on he said that it was in that period that he […]
This is one of the examples where history and tradition still have priority in a constantly changing world. The flourishing era for the button was the second half of the 17th century. In the upper social classes, the man, despite his high status, dressed independently, while the woman was always dressed by the servants. So, […]
The structural unit of nervous tissue is “Neuron”. The function of the neuron is to transmit impulses. Accordingly nerve cell can be divide into three types as Sensory neuron, Inter neuron and Motor neuron. Sensory neuron transmit impulses from sensory organs to central nervous system and Motor neuron transmit impulses from central nervous system […]
Bats make use of ultrasound (above 20000 Hz) waves to fly avoiding barriers. They emit ultrasound while flying. These waves are reflected back if they face a barrier. When a bat receives the reflected waves it can judge the position of the barriers and fly avoiding them.
Human hearing range describes the range of frequencies that can be heard by humans. Accordingly humans can detect sounds in a frequency range from about 20 Hz to 20000 Hz. Humans are most sensitive to frequencies between 2,000 and 5,000 Hz. And also sounds we can’t hear that is below 20 Hz (Infra-sound) and above […]
