London’s annual Trafalgar Square Christmas tree is a token of gratitude for British support to Norway during the Second World War.

The Norway spruce has been given to the people of London by the city of Oslo each year since 1947.

#FactOfTheDay #ChristmasTree #Norway #UK #London #History #WW2

White light is a mix of all visible wavelengths. Newton proved this in 1666 by splitting light into a rainbow with a prism, then recombining the colors back into white with a second prism.

https://sciencecards.org/physics/white-light-is-a.html

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White light is a mix of all visible wavelengths. Newton proved this in 1666 by splitt… — ScienceCards

What did Newton prove by using a prism?

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There were just 33 years between the Spitfire and the Concorde maiden flights

On 5 March 1936, Captain Joseph “Mutt” Summers flew the first Spitfire test flight.

On 2 March 1969, Major André Turcat flew the first Concorde test flight.

#FactOfTheDay #Spitfire #Concorde #UK #France #Aviation

Sea turtles navigate thousands of miles using Earth's magnetic field as a biological GPS. They detect both intensity and angle—hatchlings reorient instantly when researchers shift the field.

https://sciencecards.org/biology/sea-turtles-navigate-thousands.html

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Sea turtles navigate thousands of miles using Earth's magnetic field as a biological… — ScienceCards

What do sea turtles use to navigate thousands of miles?

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Until the 15th century England’s parliament was conducted in French.

The 1066 Norman Conquest made it the language of the court, law and politics.

Even today, the UK’s parliament passes bills between its houses using the Old French “Soit baillé aux Seigneurs”.

#FactOfTheDay #French #UK #Politics

Quantum tunneling lets particles pass energy barriers they classically can’t—powering fusion in stars. This also enables flash memory, tunnel diodes, scanning tunneling microscopes, and quantum computers.

https://sciencecards.org/quantum/quantum-tunneling-lets-particles.html

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Quantum tunneling lets particles pass energy barriers they classically can’t—powering… — ScienceCards

What is it called when particles pass energy barriers they classically can't?

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That is beautiful.

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Queen Margrethe II was the first Danish monarch not named Frederik or Christian in 459 years.

Queen Margrethe II of Denmark ascended the throne in 1972 as the first Danish monarch not named Frederik or Christian since 1513.

She was succeeded by her son, Frederik X, in 2024.

#FactOfTheDay #Denmark

A teaspoon of soil teems with billions of microbes that play a role in biodiversity and ecosystem health. Even the smallest organisms play a crucial role in maintaining the balance of nature.

https://sciencecards.org/ecology/a-teaspoon-of-soil.html

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A teaspoon of soil teems with billions of microbes that play a role in biodiversity a… — ScienceCards

How many microbes are found in a teaspoon of soil?

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In 1881, the Isle of Man became the world’s first nation to grant votes to women in national elections, by removing the word ‘male’ from a Bill.

In January a proposition to remove the word passed by 16 to 3, in March the first women cast their votes.

#FactOfTheDay #Women #Suffrage #IsleOfMan