Anton St-Jacques from Kingston asks

I heard that all cells only come from existing cells. If this is true, how did the first cells...

Josh from New York asks

If hydrogen peroxide is bad for cells, why is it good for cuts? Also, how is it a good treatment...

Chloe Jones from London asks

Why do trees lose their leaves?

Donna Creighton from Havre de Grace MD asks

Do noses and ears continue to grow throughout the lifetime?

Colin Genade asks

I have seen some advertised ice packs that claim to have salt water solution in them and a clicker,...

JenJen186@aol.com from Orland Park asks

Is there a way to actually eliminate the cancer from every infected cell in the body to truly cure...

Kelly from Toronto asks

True/False. If the moon rises when the sun sets, is it a full moon?

Rita from Lisle asks

My 4th grade son is doing a science project on eye color and we can't find any info about the...

Steve T from Kingston, ON asks

Light is refracted because its speed decreases when it enters a denser medium. Why does it speed...

Yevgeniy from SI asks

Can you hear a bat flap it's wings if it is relatively close say 1-2 meters?

Koshoua from Leola asks

What is the substance or chemical in nail polish that makes it dry?

Nilakshan from Toronto asks

What is the effect of calcium on plant growth?

Richard Allan from Calgary asks

I am looking for information on the molecular level electromagnetic resonance frequency of various...

kristy asks

Which plants would be good to use in an experiment testing different types of plant foods on...

Laurel from Belton asks

Can extraterrestrial matter carry unknown viruses and fall down to Earth in a form of "space dust"...

Tara Longfellow from Chilliwack asks

I was wondering what the breakdown products of ethanol in the body are .... water and what? What...

Chad Seibert from Poseyville, IN asks

How come you can boil an egg in a paper cup over hot coals and the cup does not burn up?

Jennifer Easterly from Sydney, NS asks

What happens to a bullet fired straight up into the air? Does gravity eventually slow it down so it...

Garry Scott from Surrey BC asks

I have been trying to get an answer to: what kind of fire supression system may be on board the...

Josh from niagara falls asks

What is the ingredient used to make "hair gel" stiff and hold?

Nameless from Internet asks

Chloroplasts, which help give the cell energy using photosynthesis, also make the cell green,...

eric from lynbrook, ny asks

What animal has the highest level of testosterone in their body?

Heather Purdie from Edinburgh asks

At what age does your heart stop growing? I have just watched a program and a young girl was given...

Dan from Madison asks

In junior high school, our science teacher demonstrated the difference between the surface tension...

Al Ullman asks

What is "route dependent toxicity"?

Mike from the Internet asks

I have a question which is a bit strange but in all honesty i don't know and i was hoping you could...

Alexandra from Coquitlam asks

What are thoughts made from? Are they measurable?

David from the Internet asks

During cellular respiration, why can't NADH pass its electrons to NAD+ across the inner membrane of...

D from Toowoomba asks

I have been told that it's useful to plot changes in systolic and diastolic blood pressure when I...

Ethan Heil from Salem, VA asks

I heard that many cereals are fortified with iron chips on the actual cereal. Is there an...

Travis from Mt Vision asks

What's the length of time the body needs to get rid of LSD, opiates, marijuana, and other drugs? I...

Jason Ting from Beijing asks

Can phytoplankton live with only nutrients not sunlight?

UML @ Lake.Sherwood .School from Baton Rouge asks

What cause the red dye to explore when it leaves the bank during a robbery? Does the red dye ever...

Nijin from KHD asks

Is there any living thing that doesn't need water to survive in the whole life? If there is...

Wesley O. Smith from Yuma, TN USA asks

I have 10 gallons of new battery acid 31%-39% Sulphuric acid, SP gr. 1.26. I need concentrated...

Arnaldo from montreal asks

Is it possible make the aluminium transparent ?

Sam from Mumbai, India asks

I have learned that our whole body is made of chemicals. Then our every action must be predefined...

Charles from Vancouver, BC asks

The earth receives energy in the form of radiation from the sun. Some is re-emitted into space and...

JR from Houston asks

Does your gag reflex trigger the epiglottis to open or close?

Jeffrey Pope from Toronto asks

How fast does the earth move in its trajectory around the sun? (km-hr) What total distance does...