Planet Earth

Do other planets influence Earth’s tides? © Getty Images

What causes rogue waves?

What’s the biggest man-made hole in the world? © Getty Images

What’s the biggest man-made hole in the world?

What's the highest mountain on the ocean floor? © Getty Images

What is the highest mountain on the ocean bed?

Can boats sail faster than the wind? © Getty Images

Can boats sail faster than the wind propelling them?

Which is less green: soap or shower gel? © Getty Images

Which is less green: soap or shower gel?

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Disasters: is the UK immune?

Why does altitude affect air temperature? © Getty Images

Why does altitude affect air temperature?

Is there more oxygen in the air in the summer? © iStock

Is there more oxygen in the air in the summer?

What will be the long-term consequence of the cooling of the Earth's interior? © Getty Images

What will happen if the Earth’s core cooled down?

How does salt melt snow? © iStock

How does salt melt snow?

How big is Prince Charles' carbon footprint? © Getty Images

How big is Prince Charles’s carbon footprint?

How clean is the Mediterranean? © Getty Images

How clean is the Mediterranean?

What’s the difference between a cyclone and a hurricane? © Getty Images

What’s the difference between a cyclone and a hurricane?

The days that could change Earth © Getty Images

The days that could change Earth

Where will all the oil from Deepwater Horizon go? © Getty Images

Where will all the oil from Deepwater Horizon go?