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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?

Shauna from Winnipeg asks

Is snow a conductor or an insulator?

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? ...

sinthuja asks

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

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?

Jeff asks

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

Carla Poot asks

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

Fran Barnes from Kooskia, ID asks

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

Mireille Messier from Toronto asks

What's smaller, a quark or a neutrino?

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...

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?

Maren from Cold Spring asks

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

Jon asks

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

Hannah from Austin asks

Why does salt melt ice?

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...

Frank asks

What does cytoplasm do in the cell?

Matt Hiemenz from Manitoba asks

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

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...

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...

Melodia from Montreal asks

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

Dave Carmean from Vancouver asks

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

David asks

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

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?

doug eneberg from Seattle, WA asks

How many scientists does Canada have?

Harshita from Sydney asks

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

Avi from Vancouver, Canada asks

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

Tappar from New Delhi asks

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

Christina from Orland Park asks

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

Owen Richardson from Cobble Hill (Vancouver Island, B.C.) asks

I understand that cancer is caused by mutations in some of the genes that regulate cell growth and...

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...

J. Fretwell from Parry Sound asks

I do not know if this might relate to Global Warming, but I notice no one has mentioned (maybe I...

Deion Christopher from Missouri asks

Can you really grow plants from the seeds found in Mammoth feces? In national parks here in...

Serge Bellemare from Montreal asks

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