9th May 2016
Butterflies are delicate creatures and they are affected by climate change. A large population of butterflies indicates a healthy ecosystem and a dearth of butterflies indicates that the ecosystem is under stress. Butterflies are unable to fly if their body temperatures drop below 30 degrees Celcius.
9th May 2016
Until recently, criminals in the US were executed using an electric chair. Nowadays a different form of execution by lethal injection is practised. Before the electric chair, the condemned criminals were hanged. However, a dentist Dr Alfred P. Southwick happened to witness a drunken man getting electrocuted and dying instantly when he touched a live electric generator. He was horrified. However, it later occurred to him that this method of electrocution could be used to humanely execute condemned criminals. As a dentist he worked using chairs, so the idea of the instrument occurred in the form of a chair.
9th May 2016
An average hurricane bringing in 1.5 cm per day of rain, with a circle radius of 665 km, generates a huge amount of energy (6.0 × 1014 Watts or 5.2 × 1019 Joules/ day), which is equivalent of 200 times the electricity-generating capacity of the entire planet in a year. This is equivalent to detonating a ten megaton nuclear bomb every 20 minutes. In 10 minutes a hurricane releases more energy than all of the world’s nuclear weapons combined.
