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Articles on Earth

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Scientists have been studying lunar samples brought back from Apollo missions to understand the geologic history of the Moon. NASA

Moon lacked a magnetic field for nearly all its history – new research resolves mystery sparked by rocks brought back on Apollo

Without a magnetic field, the Moon’s surface is exposed to solar wind. These could have been depositing resources like water and potential rocket fuel on the Moon’s surface for billions of years.
The planet and the way we live on it are constantly changing. Buena Vista Images via Getty Images

What will the Earth be like in 500 years?

The Earth is constantly changing in natural ways, but most of those changes are very slow. Humans are speeding up other changes with global warming.
Gravity feels like it’s pulling everything toward Earth, but why? AdventurePhoto/E+ via WikimediaCommons

Why does gravity pull us down and not up?

Gravity is something every person on Earth intuitively understands: It is what keeps you on the ground. But how come gravity pulls down, rather than pushes up? Einstein came up with the answer.
It can stretch your mind to ponder what’s really out there. Stijn Dijkstra/EyeEm via Getty Images

Does outer space end – or go on forever?

Astronomers know a lot about what's in outer space – and think it's possible it never ends.
Clayoquot Sound, part of the Tla-o-qui-aht territory, has been the site of numerous protests against logging the forest. Meares Island was declared a Tribal Park in 1984. (Shutterstock)

Respect for Indigenous knowledge must lead nature conservation efforts in Canada

To combat the biodiversity crisis, we need to fundamentally shift our economy and society and make nature conservation the norm.
The sky can be so many different things: it can be big, beautiful and blue, or grey, cloudy and rainy. It can also be full of stars, or full of orange and red clouds at sunset or sunrise. (Shutterstock)

Curious Kids: What is the sky?

A young reader asks: What is the sky?
Where do the hydrogen and oxygen that make up the earth’s water come from? NASA Goddard/Flickr

Why is there water on Earth?

A recent study shows that the Earth’s water could come directly from the oxygen and hydrogen present in the rocks that formed it, and not from a late supply by asteroids.
The greenhouse effect and plate tectonics are essential for maintaining water on the Earth’s surface. NASA/Goddard Space Flight Center/Reto Stöckli

Why is the Earth blue?

The presence of water on the Earth’s surface is the result of a subtle balance between different mechanisms in the atmosphere and below the surface.

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