Where Do Tears Come From?
Tears flow from glands under the eyelid. Even though we are not aware of it, there are tears in our eyes all the time – even when we’re not crying. Every time we blink,...
Read MoreTears flow from glands under the eyelid. Even though we are not aware of it, there are tears in our eyes all the time – even when we’re not crying. Every time we blink,...
Read MoreHow Does a Washing Machine Get Clothes Clean? A washing machine swishes clothes around in soapy water until the dirt has been removed. A washer has a tub and an...
Read MoreHow Big Is a Dump Truck? Of course, dump trucks are big. They have to be! They usually have large diesel engines and anywhere from six to a dozen tires. Dump trucks are...
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