Why is red light used in submarines?

Submarines switch to red light when it’s dark outside and crew members need to use the periscope or go on watch duty.

The human eye is less sensitive to longer wavelengths which is why the red light is chosen, as it preserves the crew member's night vision whilst still allowing them to still see their instrument panels.

 

Marooning

Marooning is the action of leaving someone behind deliberately on an uninhabited island.

The word appears from the early 1700's and is derived from the term maroon, a word for a fugitive slave, which could be a corruption of Spanish cimarrón, meaning 'wild'.

The practice was oten a penalty for crewmen, or for (bad) captains at the hands of their crew.

A marooned man was set on a deserted island; often no more than a sand bar at low tide.

He would be given some food, a container of water, and a loaded pistol so he could commit suicide if he desired.

The outcome of marooning was usually fatal.

The main practitioners of marooning were pirates, to such a degree that they were frequently referred to as "marooners".

The writings of Welsh pirate Bartholomew Roberts (Barti Ddu) describe marooning as a punishment for cheating fellow pirates or other offences.

 

 

Last Execution in the Tower of London

The last execution in the Tower of London took place during World War II when Josef Jakobs, a German soldier, was captured while parachuting into England.

After a quick trial in Brixton, he was convicted of espionage, brought to the Tower, held overnight, and executed by firing squad on August 14, 1941.

The chair in which he sat during his execution is still on display.

Jakobs was one of hundreds who were executed at the Tower of London during its 900 year history, and as a result it has gained a reputation as one of the most haunted locations in Britain.

 

 

Honey Bees die when they sting

A honeybee’s stinger is made of two barbed lancets.

When the bee stings, it is unable to get the stinger back out.

It leaves behind not only the stinger but also part of its digestive tract, along with muscles and nerves.

It is the tearing of the abdomen and not the sting which kills the bee.

Did you know?

  • 1
  • 2
  • 3