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Kenneth Hickford from London, England asks

How many active volcanoes are there at any onetime on the Earth, and how much "Greenhouse" gas do...

Neil O. from Oshawa asks

What is your personal view of global warming? Do you believe that humans are having a significant...

Michael Comeau from the Internet asks

What must occur for two parents with blood type AB to have a child with blood type O?

Karen Lynn from toronto asks

I have blue eyes and am the mother of a son who has blue eyes as well. His father has brown eyes....

Bob Salo from Michigan asks

If matter expands when heated, and contracts when cooled, why does ice expand when water freezes? ...

Shauna from Winnipeg asks

Is snow a conductor or an insulator?

Jessie Meyers from Sydney asks

Why does lemon prevent the browning of apples? When browning of apples is caused by a reaction with...

Tania asks

How does dish soap work to clean dishes?

Ashley Robertson asks

Why is the sound of fingernails scratching against a chalkboard so irritating to listen to?

sinthuja asks

Do the cells in the heart tissue know if there is something wrong with the heart. If so, how do the...

Fran Barnes from Kooskia, ID asks

I have spent 4-5 hrs. attempting to magnetize some iron (Fe) washers using a 12V battery and...

Carla Poot asks

Why can't an insect grow large enough to terrorize a city?

Jeff asks

Are we the center of the Universe? Does it always appear to an observer that he/she is at the...

Jon asks

Why doesn't a neon sign finally "run out" of exited atoms and produce dimmer and dimmer light?

Janice Tsui from Toronto asks

How long can someone sustain without sleep? What factors would change that number of hours or days?...

rebecca from Adelaide asks

What is the difference between science and sciencing?

Carole Smith from Timmins, Ontario Canada asks

My son, age 12 is asking for a chemistry set for Christmas. This is an area that has always...

William Kirwan from Limerick Republic of Ireland asks

How much heat energy (watts) is released from the human body? Is there a relation to the area of...

Mireille Messier from Toronto asks

What's smaller, a quark or a neutrino?

Michael Doggett from Kingston, ONTARIO, CANADA asks

We have an older pop machine at work with canned soft drinks. Sometimes, when a pop is opened that...

Matt Hiemenz from Manitoba asks

Electricity. It powers almost all household appliances as well as the complex electronics we rely...

Maren from Cold Spring asks

Why does phenolphthalein turn pink with a base? I know it has something to do with light, but i...

Frank asks

What does cytoplasm do in the cell?

Hannah from Austin asks

Why does salt melt ice?

Kelvin C from Markham, Ontario, Canada, Amérique du Nord asks

I was and I still am wondering if there are any really complex questions that even scientists...

Dave Carmean from Vancouver asks

Why does a digital camera need a shutter- I think it should be able to electronically shunt the...

Melodia from Montreal asks

Approximately how many nuclear tests do the americans alone conduct every year?

David asks

Physicians often want to know the glucose and lipid levels in a patient's blood and whether...

Harshita from Sydney asks

I have conducted an experiment with a parachute. I was investigating whether the time taken to...

Pete Peterson asks

Why does a balloon travelling inside a car seem to violate Newton's laws? Imagine a toy helium...

Johnathan from Sydney asks

What happens when you use ethanol (unblended) in a standard, unleaded car engine? Will it work?

Tappar from New Delhi asks

How did scientists conclude that a major part of our genome is junk? Did they search for open...

Paul Martos from Michigan City, Indiana asks

I have a small laser pointer. The spot produced by the beam is not a solid red circle, but a fuzzy...

doug eneberg from Seattle, WA asks

How many scientists does Canada have?

Avi from Vancouver, Canada asks

Are double yolked eggs ever viable? Can they be fertilized? If so are they to be fertilized once or...

Serge Bellemare from Montreal asks

Since the Big Bang we see (with Hubert Reeves and other scientists) that matter has a tendency to...

Christina from Orland Park asks

What process does a jellyfish go through when it stings something?

Simon Robson from Durham, UK asks

If the world's land was distributed evenly between all humans how much would we all possess? This...

Todd asks

I am curious. What if two magnetic field lines were to intersect each other? What would this imply...

Stephanie from Winnipeg asks

I heard that if you set fire to methylated spirit, it will catch fire, but nothing around it will...