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Pat Prokop from Orillia asks

Last year a friend of mine widened and deepened an existing pond on his property. A considerable...

Serge Bellemare asks

Do all planets and stars rotate on themselves, and do we know why?

Boo from Mississauga asks

Why do some people use salt to kill weeds? What does salt do that makes the weeds die?

Lisa Yang asks

How do split ends affect the way your hair grows? Why do people say that when you have split ends,...

Kjell from Edmonton asks

Does light exert force?

James from Hamilton asks

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

Ondraya Espenshade from York asks

Is either Klebsiella pneumoniae or Serratia marcescens documented to be able to extract naked DNA...

H Beken from Dayton, Ohio asks

I have been trying to find formulas for simple auto windshield washer fluid. Can't find anything....

harish from scarborough asks

What is the difference between fats and cholestrol?

Karl-Alexander Berg Brisebois from Dunham asks

Conservation of momentum can explain the exchange of a virtual photon between two electrons and the...

Unknown asks

Are there living beings which do not die?

Rick Anderson asks

Is the air we exhale pure carbon dioxide? If not, then what is it?

Alexandra asks

What's a gathering of frogs called? What's a gathering of toads called?

Matt from the Internet asks

Is the orbit of the moon around earth a perfect circle? If not, when is the moon closest to us? ...

Rafael Sumalinog from Edmonton asks

What is immunofluorescence analysis, what basic materials are used, and how long does it take to...

Eric Johnson asks

Is it harmful to inhale sulfur which has been heated?

John Collins from West Vancouver asks

(Re: E=Mc^2) Why does E/M=c^2 rather than simply c^1 (which is an altogether respectably large...

Michal Jaworski from Calgary asks

A black hole is a central point the size of a pinhead where a huge amount of mass is concentrated....

Brian from Denver, CO asks

When eating spicy foods, the tongue and lips can get a burning sensation. Why don't the insides of...

Corinne Keffer from Halifax, NS asks

I have a liquid crystal display screen computer monitor. I am looking for unbiased information on...

Sahm Atman from Berkeley, CA asks

I understand why magnetism is a relativistic effect, "caused" by Lorenz contraction effectively...

Sahm Atman from Berkeley asks

Supposedly in classical electromagnetism an accelerating charge radiates. If so, why? If so, then...

Cynthia from Chilliwack, Canada asks

IF my blood type is A negative what are my parents' blood types? What does it mean to have negative...

David Cheverie asks

How do you know what size lobsters should be released instead of taken, in order to ensure the...

BALKRISHAN ARORA from Pune, India asks

1. I would like to know when was Hubble's constant discovered / invented? 2. How many times it...

petra from chamblee asks

How long does it take styrofoam to decompose? Are there chemicals that help to cause the...

B.Krystol from Jasper asks

Why is Isobutane ( C4H8) a gas at 25 C and Dodecahedrane ( C20H20) a solid at 25 C?

Michael from Winnipeg asks

I've been doing a science fair project testing the effectiveness of Lactaid(TM) lactase. From a...

Stephen Ross from Hong Kong asks

1) Which of the following two options is more widely accepted by the scientific community? a)...

justine van der Werf from Tiaro asks

I have read that when oxygen is condensed to a liquid state, or indeed to a solid state it becomes...

Darrin asks

If light is made of photons, and photons have mass, and many photons of light are hitting the earth...

Sylvain Koenig from the University of Lausanne (Switzerland) asks

Why would one person when he returns from travel at the speed of light have aged differently than...

Zambi Donburi from Brisbane, Queensland, Australia asks

How did we (as a race) evolve eyebrows and eyelashes. The way I understand it is that to evolve...

Samantha from London asks

At which age do the nasal bones and the mandible complete ossification?

Andrew Hickey asks

Why do wet objects shine?

Adam Roda asks

Why do we yawn when we see someone else yawn? Why is it contagious?

Xinyi Chong from Beijing asks

Do shells have nutrients in them? If so, what actually uses those nutrients?

Atul Mulay asks

What chemical reaction takes place when you use henna to tint skin? Is it possible to extract the...

Sandra Lenzi from Morris Plains, NJ asks

Why is the helical content higher in gelatin with higher molecular weight. In other words, it seems...

Terra from Ontario asks

How does sugar conserve food?