Most popular

Nick (via his mother Illan) from Denver, Colorado asks

I put frozen spinach, fresh spinach, canned spinach, frozen peaches, fresh peaches and canned...

Jeff asks

How do astronomers know the true position of stars? When astronomers show us pictures of the Great...

Srikar from Mississauga, Ontario asks

If Pluto is not a planet, how is it classified? What is it called now?

Julie from Portland, Oregon asks

How are sand dollars bleached white? Is it by the sun or the sea?

D.D. from St.john's, NL asks

Ethanol is the focus of many tax dollars these days. It seems to me that the burning of any...

Damanjit Singh from New Delhi, India asks

What will happen if we use petrol in a diesel engine or vice versa?

Rory from winnipeg asks

Why is it that a difference in the number of electrons in an atom makes a completely different kind...

Zach from Greenwood, Nova Scotia asks

Hi, I was just wondering, I wanted to get into the whole biology scheme of things when I get older...

Sandra Roberts from Toronto, Ontario asks

Is there a difference between total recall and a photographic memory?

Kate Cunningham from Wellington NZ asks

I saw you answer to the composition of banana peels, but I would really like to know what chemical...

Yevgeniy Perev from Staten Island asks

How much energy in joules will be produced from an exploding mini black hole that is 10 micrograms...

Mateusz from New York asks

Is it true that the moon moves away from the earth a few centimeters each year? Also do satellites...

Michal Jaworski from Calgary asks

When a nuclear particle radiates either an Alpha, Beta or Gamma praticle can that process be...

Steph from London, England asks

I've often wondered about this. It's kind of complicated, so bear with me... If a person suddenly...

Rafael Bourdieu asks

Can you tell me about enhancing mental performance and cognitive abilities through brain nutrition...

James from Montreal asks

There has been much mention of antimatter, such as antineutrinos. I was wondering what exactly...

Kristina from Ottawa, Ontario asks

I was just wondering what the ratio is between male and female scientists?

Avadhuta Raya from Amsterdam asks

I imagine there must be a gene for lactose tolerance in mammals and humans? They have to have it,...

Monse from Las Vegas asks

What type of salt melts ice the quickest?

Heidi from Malaysia asks

Could you please tell me what is inertia? Will it bring us more good than bad in our life? Will you...

Sébastien Morin asks

How is aspartame synthesized (theoretically and within industrial processes)?

Kelvin C from GTA asks

Why is it that when calculating the volume of a pyramid, such as a cone, you always have to divide...

Sam asks

There is this question in my physics book asking me to check out the ways plants wrap themselves...

Ryan from Pittsburgh, PA asks

I'm curious about the possibility of "real"  superheroes.  Even though I think...

luke kujawa from armada asks

What is the chemical composition of basic aluminum, steel, and brass, and which metal conducts heat...

Jonathan from Kuala Lumpur, Malaysia asks

Is it possible for the air that we breathe to either run out or deteriorate to such an extent that...

kaushik from bangalore asks

Why is the sky blue?

Jim Davis asks

For some reason, it is common knowledge in this community that when subjected to cold, hot water...

Tim Wiebe asks

Since a plane's wing is designed to fly right side up, how does a plane stay up in the air when it...

Joan & Colleen asks

Are cats left- or right-pawed? What percentage are left pawed/right pawed? We are doing some...

Richard from Flesherton asks

What are the causes of Northern Lights? Do they have any relation to the green-house gasses in the...

Steve Arkin from San Diego asks

How is the spin imparted to a golf ball during the collision with a driver determined? The paradox...

Sarah from Fredericton, NB asks

What is the chemical in banana that causes drowsiness?

Cesar from kalookan asks

What are the components of a fever strip and the chemical principles behind it?

JP from Chandler asks

Given that the Earth's magnetosphere is what protects us and all life on Earth from the deadly...

Jim from Philadelphia asks

Why doesn't a person lose 9 lb when they consume 1 litre of ice water? If a calorie is the energy...

Anthony Daddazio from Maple asks

I have had some alkaline batteries (AAA, and AA) that have leaked. These batteries were in a TV...

Lisa Pearce from Gympie asks

In winter in very cold countries like Canada and Finland, most rivers, lakes and ponds freeze over....

Dave asks

Is it possible for a girl to get pregnant even if the man did not fully ejaculate? If a man and...

Michael Parks from Scotch Lake, Cape Breton, N.S. asks

If nothing can escape from a black hole, how come we are here? The big bang must have...