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Spider web clipart

Why are spider webs so strong ?

Spider webs withstand hurricane winds. A thread break affects a section of the web. The web remains intact, supported by other threads.

Spider web design has inspired inventions like extra strong surgical tapes, computer networks, glass roofs and hanging bridges.

>>   TRIVIA

Crow Raven clipart

◉ Crows use sticks to reach food in narrow spaces.
◉ Crows help hunting animals find weak victims.
◉ Research shows Crows count numbers upto 5.
◉ Crows make 20 to 30 different types of sounds.
◉ Crows see more colors, including UltraViolet.

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>>   QUIZ

Geo Magnet

Earth's magnetic field is due to ?


Earths magnetic field protects us from harmful cosmic radiations. What causes this magnetic field ?

Hint :
It comes from deep within Earth.




Answer : "Electric currents in liquid core"

Earths outer core is made of liquid iron and nickel. Movement in this layer causes electric current.

Earth's liquid core is slowly turning solid, releasing heat.

Called convection currents, these heat waves move the liquid outer core creating a magnetic field.

>> PUZZLE

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