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Is blood ever really blue?

Is blood ever blue? That is, is there ever really such a thing as blue blood – outside the science-fiction world, anyway?

A super stellar gallery of galaxies

Our galaxy, the Milky Way, is typical: it has hundreds of billions of stars, enough gas and dust to make billions more stars, and at least ten times as much

Should you get a DSLR camera?

Should you get a DSLR camera? The Digital Single-Lens Reflex camera has undergone an absolute explosion in popularity – but it is right for you?

Why does your hair turn gray?

It’s well-known that a reduction of pigment will make your hair turn gray – but why this happens remains somewhat of a mystery.

How to tell if gold is real

It only makes sense that you would want to find out if the jewelry your aunt left you is worth anything, so here’s how to tell if gold is real or fake.

How do 3D printers work?

Not long ago, the idea of printing three-dimensional objects at home might have sounded like a thing out of The Jetsons. So how do 3D printers work, anyway?

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75 great names for a grandpa - Having fun with grandbaby

75 great names for a grandpa

Mom and mama are common nicknames for fathers – but when it comes to grandfathers, you might need ideas. Here are 75 names for a grandpa that you can consider!

75 great names for a grandma - Having fun with grandchild

75 great names for a grandma

Mom and mama are common nicknames for mothers – but when it comes to grandmothers, you might need ideas. Here are 75 names for a grandma that you can consider!