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Rick Anderson asks

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

Kaycie Nabeta asks

Can you explain where the "extra" ATP comes from in photosynthesis? As I understand it: 24 ATP...

James from Hamilton asks

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

David Cheverie asks

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

Cathy Schroeder asks

Why do batteries behave differently when kept at different temperatures? In my science project a...

harish from scarborough asks

What is the difference between fats and cholestrol?

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...

Krisy Marsh asks

How would one maintain a bacterial culture without having to transfer cultures on a regular basis?

Ondraya Espenshade from York asks

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

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...

Sahm Atman from Berkeley, CA asks

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

Darrin asks

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

Xinyi Chong from Beijing asks

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

Samantha from London asks

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

Unknown asks

Are there living beings which do not die?

Karl-Alexander Berg Brisebois from Dunham asks

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

Sahm Atman from Berkeley asks

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

Stephen Ross from Hong Kong asks

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

Corinne Keffer from Halifax, NS asks

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

Atul Mulay asks

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

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...

petra from chamblee asks

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

Rafael Sumalinog from Edmonton asks

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

Serge Bellemare asks

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

Lee Ming Fei asks

Why does chalk, a cylinder, always break into three pieces when it falls, and not into two or four...

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...

H Beken from Dayton, Ohio asks

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

Ram Ajore from Delhi, INDIA asks

What are the ways in molecular biology to show confirmation of hybridization on a solid surface for...

Loubelle I. Depita from Koronadal City, South Cotabato,Philippines asks

Why does nutrasweet or aspartame loses its effectiveness in cooking or in processes requiring...

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...

B.Krystol from Jasper asks

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

Ryan from Maryland asks

I'm doing a science experiment with magnets and was wondering, do magnets lose their strength over...

D. Andrew White from Toronto asks

Do different isotopes vary slightly in chemical properties? Or are they the same? i.e. are the...

Eric Johnson asks

Is it harmful to inhale sulfur which has been heated?

Peter Gensch from Auckland, New Zealand asks

Is there an effective and affordable way to kill weeds on an organic basis? (i.e. vinegar?)

Kjell from Edmonton asks

Does light exert force?

BALKRISHAN ARORA from Pune, India asks

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

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? ...

Sandra Lenzi from Morris Plains, NJ asks

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