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Sherri from Baltimore asks

Does Henna (a plant based hair dye) contain any aluminum in its substances?

Scott Livingston from Charlottetown, Prince Edward Island asks

Looking for pictures of Tranquility base or any of the other lunar landing spots on the moon taken...

Base from Ontario asks

Why is vegetable oil viscous?

Holly asks

What is the difference between a dolphin and a porpoise?

Richard Hart from Victoria, BC, Canada asks

My wife asked me, "What does the sun burn and why doesn't it burn out?" I told her about helium...

Andrew from Friendly asks

Who was the first scientist to study light?

Vasu from London,ON asks

Is it possible for a singularity to form outside a black hole?

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

Why is sterilizing & using alcohol effective against microorganism?

John Jones asks

Why has our departmental tarantula, who lives in my office, retreated into a cardboard tube and...

Matt from Pickering asks

How are genes located? For instance, Lap-Chee Tsui and his team of geneticists located the...

James from Hamilton asks

If 'O' (oxygen) is an element and CO2 is a compund...what is O2, or Cl2?

Roman Tanisis from Coquitlam, BC asks

Hi was always wondering if it is ok to use a higher voltage power supply for a lower voltage...

Cristina asks

How far is the Sun from Pluto? How long does it take for sunlight to travel to Pluto?

The Tucker Family from Hamilton asks

How many people have ever lived on earth? We have found data giving the population at differen...

Kim Monin from Nepean, Ontario asks

I am trying to make natural beeswax into an ivory colour. Some people say they use natural dyes. ...

missy cunningham from portsmouth asks

Every time we go to our local grocery store and get a buggy that does not have a chain hanging from...

Jessia from Ontario asks

How high in the sky would Polaris the North Star be, as seen from the North Pole?

Kiana Stewart from Blacksburg asks

If Virginia sees a full moon in the daytime then do places like Australia see no moon at night?

Ric Martin from Houston B.C. Canada asks

Can someone tell me what Canadian frogs and toads are vocal? We have several types here, but they...

Denise Atkins asks

What causes asteroids to burn up once they enter earth's atmosphere?

Tom Henson from Bettendorf, Iowa asks

I am doing a science project on how light affects plant growth. If you could answer my 10...

Karen from Ottawa, Canada asks

Why do your fingernails grow a lot faster than your toenails?

Michel asks

If Humans and Apes are related, why aren't we able to reproduce together?

samantha from Sarnia asks

Is it true that only female bees can sting you? And if it is, why is that?

Mauro Mavrinac from Ottawa asks

Given: a horizontal rigid tube with one end on an axis at a constant rotation. Insert a solid ball...

Edward from Mississauga, ON asks

I have a wierd thinking question regarding electricity. When we have a positive charge or a...

Daniel from Singapore asks

Is there such thing as an Ice Bullet? A bullet that melts into the target so that there will be...

Tsiadimos Nick from Athens, Greece asks

If we put a current-carrying conductor inside a magnetic field (i.e. between two permanent...

Asli Tamer asks

How do bacteria use rhodopsin to create energy?

Wayne Boutzale asks

What are giant ice meteorites? Would it be possible for them to hit the earth?

özgür o?uz from Yata?an/Mu?la asks

How can an ant hold up a weight which is 50 times more heavy than ant's own weight?

sabiha yamin from lahore, pakistan asks

I want to knock out the PHB depolymerase gene from the genomic DNA of a bacterium. Can you suggest...

Shagufta asks

What are cosmic rays?

Avishan from the Internet asks

Why is the strawberry in yogurt flavored strawberry sometimes brown or reddish brown? Is it a...

Bonita asks

I lost my sense of smell after a fall from a horse 5 years ago. The back of my head hit the...

Abhinav from Delhi asks

Why do all planets revolve in elliptical orbits around the sun? I mean in nature there existis...

Saurabh from New Delhi asks

Gravity can produce motion in a body. Thus, it does work. But, for doing work, energy is needed....

Sue from Mississauga,On. Canada asks

What is the chemical composition of soya margarine?

John Douglass asks

Hexane seeps out of the ground at old sites of underground gasoline storage tanks. Can I smell...

Sara asks

If the first dimension is length, the second is width, and the third is depth/height, what's the...