Author name: Threeyzmonkeys

#205 When was the first stamp?

I learned this today. The first postage stamp was issued by the post office in Britain on May 1st, 1840. Like most inventions, the postage stamp was invented to solve a problem. That problem was that post in Britain was paid for by the recipient and not the sender. Before the invention of the stamp, […]

#205 When was the first stamp? Read More »

#203 How does a pacemaker work?

I learned this today. A pacemaker works by using electrical stimulation to make the heart muscles contract and the heart pump blood. A pacemaker is used to alter the rhythm of a heart. It is usually implanted to help with a slow or an irregular heartbeat. There are many reasons why a heartbeat could become

#203 How does a pacemaker work? Read More »

#200 Why are plants green?

I learned this today. Plants are green because they absorb light in the wavelengths that are red and blue, while reflecting light in the wavelength that is green. Plants create energy through the process of photosynthesis. They convert light energy into chemical energy. Living organisms that convert light into energy are called autotrophs (photoautotrophs to

#200 Why are plants green? Read More »

#196 When did the CIA start?

I learned this today. The CIA was formed on September 18th, 1947. The idea behind some kind of agency to manage intelligence seems to have started after the Japanese attack on Pearl Harbor. America was caught unawares by the attack and a lot of people said that they should have had some idea. At the

#196 When did the CIA start? Read More »