Why does the tower of Pisa lean?

Officialy known as the ‘Torre pendente di Pisa’, the ‘Leaning Tower Of Pisa’ is a freestanding marble bell tower at the Piazza del Duomo (‘Cathedral Sqaure’) in the city of Pisa, Italy. It was once counted amongst the ‘Seven Wonders of the World’. But have you wondered why is the tower leaning? It tilts so […]

The Shape of a Raindrop

The Shape of a Raindrop This article teaches how a drop of rain changes shape as it falls through the atmosphere. High in the atmosphere water collects on dust and smoke particles in clouds. Raindrops start to form in a roughly spherical structure due to the surface tension of water. This surface tension is the […]

poisonous effect of carbon monoxide in human body – How is carbon monoxide affected patient medicated?

Carbon monoxide poisoning is caused by inhaling combustion fumes. When too much carbon monoxide is in the air you’re breathing, your body replaces the oxygen in your red blood cells with carbon monoxide. This prevents oxygen from reaching your tissues and organs. Breathing CO can cause headache, dizziness, vomiting, and nausea. If CO levels are […]

What is nanotechnology?

Imagine you have shrunk by 1500 million times and you can see atoms, molecules, proteins and cells. Shrunk down to the ‘nanoscale’ , you’d not only see the atoms that everything is made from — you’d actually be able to move them around! Now suppose you started sticking those atoms together in interesting new ways, […]

HOW DID THE EGYPTIANS PRESERVE MUMMIES?

The afterlife was one of the faiths of Ancient Egypt. One of the ways they prepared for the afterlife was to try and preserve the dead body as long as possible. They did this through a process called embalming. These embalmed bodies are called mummies. It is estimated that 70 million mummies were made in […]

WHAT ARE WHITE BLOOD CELLS?

White blood cells (WBCs), or leukocytes, are the body’s defence or immune system. In a normal adult body there are 4,000 to 10,000 (average 7,000) WBCs per microliter of blood. When the number of WBCs in your blood increases, this is a sign of an infection somewhere in your body. There are five types of […]

WHEN DID HYPNOSIS BEGIN?

Hypnosis has had a very colorful and long history. Since there have been humans, there has been hypnosis. The earliest examples can be found in ancient tribal ceremonies of our early ancestors. It was used in both healing ceremonies and ceremonies preparing for tribal war. In these early times the hypnotherapist was called a ‘shaman’. […]

How did Halloween originate?

The name Halloween is a contraction of All Hallows Even, meaning the evening of All Hallows Day (better known as All Saints’ Day). It has been named so because Halloween’s Day is celebrated on the evening of 31 October when it is also the first day of All Saints’ Day (which ends on the evening […]

How did schools originate?

Men have lived together in groups since they very earliest times. Each group tried to keep together and to find ways that would keep the group going after its individual members were gone. In order for the group and values to survive, it was necessary for the older members to teach children all that they […]

Why do the Northern Lights appear?

The Northern Lights is the common name for Aurora Borealis. It is an awe-inspiring display of the natural lights when the electrically charged particles from the Sun collide with atoms in the high altitude atmosphere. Apart from the most common pale green and pink, shades of red, yellow, green, blue, and violet have also been […]