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Nick Reed from Cherry Hill asks

I have a question regarding starfish, or seastars, whichever you would like. Is there a species of...

Val Mullen asks

Is there really a tree in Tasmania called the Huon Pine that is 20,000 years old?

Peter Griffin from Beaufort, SC asks

Are all non-toxic claiming products really non-toxic? And is there any simple way (such as a way...

Gillian from Haliburton asks

I'd like to know what happens to radio waves once they have been emitted. Do they live forever?...

Atalinder S. Bindra asks

Is it possible to reach a black hole? What is the distance of the nearest black hole from earth? Is...

Sarah from Northampton England asks

How do you measure the pH of soil? How do you make up a solution of different pHs? What is the best...

Sara asks

What happens to a compass when it is held exactly on magnetic north? Does it just spin?

James Hope from Gloucester asks

I recently read a book on the big bang, and it said that protons and neutrons are made up of 3...

Edward Driedger asks

How do touch lamps work? If one person touches the touch pad and someone else taps his other hand,...

aparna from Petaluma asks

Why is blood salty?

Jessica Reynolds asks

Since there are no molecules within the vacuum of space to allow heat transfer, how can the air...

S.Leeberman asks

How do I estimate the mass of an object when I know its volume and nothing more? For example, how...

Ed from Port Orchard, Washington, USA asks

Do magnets become less massive over time? It requires energy to hold a magnet on the refigerator...

Adil asks

Has absolute zero (0 K) ever been reached a laboratory?

Daniel Eyre asks

How far is Pluto from the sun, and will we ever be able to travel to other planets, besides the...

Robert Steinhaus from Castro Valley asks

Can a fast breeder reactor like the famous Candu series of Canadian designed fast reactors be...

Vasu from London,ON asks

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

Alvina Chung from Sydney asks

The first four facts below suggest that the earth should be getting heavier and heavier - but it...

James from Hamilton asks

How do we explain the difference between cells that can repair damaged tissue, such as skin cells,...

Wilma de leon from Philippines asks

What is the reaction between a chitin--the polysaccharide intermediate between protein and...

Dave from Sutton asks

Are there foods to eat which lower/reduce harmful cholesterol levels, or is this achieved by...

David Magill from Shippensburg asks

In 1828, Friedrich Wohler, a German chemist attempted to make an inorganic salt, ammonium cyanate,...

Pierce H. asks

Does mercury in its gas form act the same way as air - I mean if heated, does it rise?

Andrew from Friendly asks

Who was the first scientist to study light?

Rehan Ahmed from Rahim yar Khan, Pakistan asks

What is vacuum ? How is it created because if we remove the air then the instrument in which we...

TJ from Thunder Bay asks

Last spring and summer there were millions of army worms creeping all over everything. Maybe worse...

Bertrand Xiao asks

Is there a better alternative that has yet to be discovered other than zinc to be used in a battery?

Amanda Gillis from Margaree asks

What are the intermolecular forces for polycrystalline solids? And what is the geometric shape? I'm...

Duane from the Internet asks

If two magnets are in contact with each other or close proximity to each other either repulsing or...

Ian from London asks

How can I tell the difference between Zinc and Aluminium metal?

Furqan from Lahore asks

Why don't ordinary Silicon diodes emit light like LED's?

erin asks

Can you explain how those bright sticks work, the ones that glow for hours with a snap and a shake?

Francis from Ottawa asks

When a ball is rotated at the end of a string in a horizontal circle (parallel to the ground) what...

Josh from New York asks

If hydrogen peroxide is bad for cells, why is it good for cuts? Also, how is it a good treatment...

David Keirsey asks

What are the quantum numbers that are involved in the distinction between matter and antimatter? I...

Kiran Gupta from Singapore asks

Why does a rare earth magnet fall slowly in an aluminium tube but it falls really fast when I toss...

Bruce MacKinnon, CET from Kitchener, Ont asks

Is polyol used in the reaction of isocyantes (methylene diioscyante) the same compound as Glycerol?

Kelvin from Markham asks

Why does the Original Coke sink into the water, when Diet Coke floats in the water?

Ernie Epp from Kenora, ON asks

Collision of galaxie clusters. In recent news reports that I've read it has been reported...

Fester from Tacoma asks

I'm doing a science project and my topic is about the speed of sound. I was wondering if you...