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What was the first steam-powered device?

“Hero of Alexandria described the aeolipile, a spinning steam-powered ball, in the 1st century AD, though it was treated as a novelty rather than a working machine.”

Reference: Britannica

What are the different types of laptop batteries?

There are currently three types of batteries commonly used to run people's laptops:
1) Nickel Cadmium (Ni-Cd) batteries were the standard technology for years, but are now out of date.

2) Nickel Metal Hydride (Ni-MH) batteries are a cadmium-free replacement for Nickel Cadmium.
3) Lithium Ion (Li-ion) is the battery you want for your laptop and is the current standard for portable power.

Did the ancient Greeks have a steam engine?

Hero of Alexandria described the aeolipile, a spinning steam-powered device, in the first century AD, but it was treated as a curiosity rather than a machine for work.

Where did democracy begin?

Democracy began in Athens around 507 BC.

Another fact

“Hero of Alexandria described the aeolipile, a spinning steam-powered ball, in the 1st century AD, though it was treated as a novelty rather than a working machine.”

More from this shelf

What are the different types of laptop batteries?

Did the ancient Greeks have a steam engine?

Where did democracy begin?