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D. Andrew White from Toronto asks

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

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? ...

Kyra Nabeta asks

In dealing with bacterial resistance, should doctors use the strongest antibiotics now to kill off...

Sandra Lenzi from Morris Plains, NJ asks

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

David Graveline asks

What are the most recent theories about what existed before our big bang? Have there been one or...

Intruder from Singapore asks

How does a lightstick work, and what are the chemicals involved?

Andrew Hickey asks

Why do wet objects shine?

Mark Seymour asks

Why are there no penguins in the Arctic, or anywhere in the Northern Hemisphere?

Marlene Caissie asks

I heard there was a woman named Rosy involved in the discovery of the DNA double helix. Who was she...

Terra from Ontario asks

How does sugar conserve food?

Mike Noe asks

Which would hit a baseball further - a wooden bat or a aluminum bat? Why??

Adam Roda asks

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

Michael from Winnipeg asks

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

Carla Becker from Dallas asks

If we are making a perfume and we pour alcohol on an orange peel; why would the smell increase the...

Donald from Halifax asks

If neutrinos have mass, as now seems to be the case, they cannot travel at the speed of light …...

Giovanni Cuevas from Bronx asks

How much does a person's head or skull grow every year? If I'm 16, how much would it grow until it...

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...

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

Why are egg & milk used as antidotes for heavy metal poisoning and what other household remedies...

David Critch asks

My grade 10 biology teacher tells us that blood comes in different shades of red (dimmer and...

Jerry E. Allen asks

Is it possible to freeze water in a vacuum? Is there a chart that shows water temperature vs....

Ian Hancock from Calgary asks

In Chemistry today, we learned that when HCl is ionized in water, the H2O becomes H3O+, because of...

Derrick Smith from Jacksonville asks

In science fiction it is common to see P-P fusion, but my reading seems to indicate it is...

Margaret Moore asks

Can you tell me what the exact pH of the acid in our stomach?

Brandi asks

Can air in the pleural cavity cause the lungs to expand more fully than they normally would?

George Donati from Andradas-MG- Brazil asks

When you squeeze out a piece of orange-peel on a flame, it catches fire violently. Why? What is...

Benjamin Raja from Singapore asks

At what speed does the world's slowest living thing travel? And what is the world's slowest living...

Citre asks

What kind of weather is on Mercury and Saturn? Does it rain or snow on these planets?

James Hope from Gloucester asks

I have a physics paper here (don't worry i am not asking you for the answers!) that says each U-235...

Tridib Das from Guwahati, Assam, India asks

Just like 1 mole of water contains Avogadros number of molecules and has the same mass as that of...

Chris asks

Can absolute zero (0 degrees Kelvin or -273.16 degrees Celsius) be registered on a thermometer,...

Markovic Ljiljana asks

When and how was the kaleidoscope made?

Benoît Mailhot asks

Are light and matter the same thing? Can you get matter from light?

Alexa Clay asks

How do scientists modify a virus so that it can be beneficial to a host cell? For example, during a...

Lisa from London asks

When does each organ system of the human body reach full maturity?

Darrin asks

Why does an atom have neutrons and why does a specific atom have a limited amount of isotopes. For...

Karan Rana from Atlanta asks

I am doing some research on microarrays. I wish to know if mRNA's also have open reading frames as...

sabiha from lahore, pakistan asks

There is a controversy among my collegues that during agarose gel electrophoresis the band that...

Garry McKay from Melbourne asks

I've a question about solublity, water, and cyclohexanone. Water has a certain solubility in...

Karl-Alexander berg brisebois from Dunham asks

Heisenberg's uncertainty principle tells you that the mass of a particle multiplied by the...

Harry Pritchard asks

How can I find out whether it takes more effort (work by pump) to increase the air pressure in a...