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.
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…
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…
Alexander Graham Bell was a Scottish-born American inventor famous for the invention of the telephone. He died on August 2, 1922. On the day that Alexander Graham Bell was buried, millions of phones in America and Canada went dead for one minute as a mark of respect for the inventor.
A raindrop falls on the earth with varying speeds depending on its size and weight. The gravity acts on the falling raindrop and the drop picks up speed. But due to air resistance, which is generally proportional to the velocity, the raindrops attain a terminal speed. A larger raindrop would fall much faster at 9…
The national flag of Paraguay has different emblems on the obverse and reverse sides. The flag has an emblem on the obverse side, which is the national coat of arms of Paraguay that comprises a yellow five-pointed star surrounded by a green wreath capped by the words REPUBLICA DEL PARAGUAY. The emblem on the reverse…
