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The Tucker Family from Hamilton asks

How many people have ever lived on earth? We have found data giving the population at differen...

Sara asks

If the first dimension is length, the second is width, and the third is depth/height, what's the...

Dave from the Internet asks

Hi, I am looking for a procedure that I can use for a science investigation. We are testing water...

Anton St-Jacques from Kingston asks

I heard that all cells only come from existing cells. If this is true, how did the first cells...

Sherri from Baltimore asks

Does Henna (a plant based hair dye) contain any aluminum in its substances?

Andrew from Friendly asks

Who was the first scientist to study light?

Dan asks

How many galaxies do we know about and what are their names? When will the first human go to Mars?

Vasu from London,ON asks

Is it possible for a singularity to form outside a black hole?

GRACE JAJA from the Internet asks

How long does it take radio waves to reach saturn?

Ahmad asks

What are neutrinos and positrons?

from asks

I would like to know the basic principles of work of a solid state gyroscope, such as the ones used...

Joe Joe from Scarbrough asks

What is the chemical reaction involved when dyes attach to cotton fibres? Is there any difference...

Dixie from Los Angeles asks

What is a simple way to explain miscible and immiscible liquids?

Satya from Scarborough, Canada asks

Which part of the body has highest ph value?

Jeremy from Mustang asks

I am doing a science fair project and the question is this....Can people remember things better if...

Gary John Walsh asks

What is a blue moon? When will the next one be? Are there ever two in the same year?

Steven Kelliher from Abington/ MA asks

I know this must get asked a lot, but I was wondering, and doing research on the topic and am...

garrett from scarborough asks

Why is the common garter snake so common?

TINA from the Internet asks

How much chorline is added to drinking water? Why?

Amelia Singh from scarborough asks

How are rocks made? What are the different kinds of rocks?

Nijin from KHD asks

Is there any living thing that doesn't need water to survive in the whole life? If there is...

Sue from Mississauga,On. Canada asks

What is the chemical composition of soya margarine?

Shagufta asks

What are cosmic rays?

Denise Atkins asks

What causes asteroids to burn up once they enter earth's atmosphere?

Asli Tamer asks

How do bacteria use rhodopsin to create energy?

John Douglass asks

Hexane seeps out of the ground at old sites of underground gasoline storage tanks. Can I smell...

Charlie Wright from Maple Ridge, BC asks

Why do ghosts have clothes? That doesn't make sense.

Andrea from Sydney, Australia asks

I understand that when toilet paper gets wet eventually the cellulose fibres break apart thus...

sabiha yamin from lahore, pakistan asks

I want to knock out the PHB depolymerase gene from the genomic DNA of a bacterium. Can you suggest...

David Holt asks

How do farmers produce a product like seedless mandarins if they don't have any seeds to plant?

Alexis Rolling from Nampa, Alberta,Canada asks

Why was Mars formed?

Zulfikar Yassim asks

A black hole is created when a planet collapses and forms into a powerful vacuum sucking everything...

Justin Murphy from Coquitlam asks

How does what we smell affect what we taste?

Donna Creighton from Havre de Grace MD asks

Do noses and ears continue to grow throughout the lifetime?

Chad Seibert from Poseyville, IN asks

How come you can boil an egg in a paper cup over hot coals and the cup does not burn up?

Eddie Curtis from Portland asks

What differences are there in the three different types of lemmings?

Gary Kolling asks

What term is applied to all processes and physical measurements carried out under conditions of...

kristy asks

Which plants would be good to use in an experiment testing different types of plant foods on...

Aditya from Noida, India asks

How does plant's inner cells respire?

Nameless from Internet asks

If we were produced from ONE cell with ONE type of DNA how could it have reproduced into trillions...