The reason we have seasons is because, during its journey around the Sun, the Earth is tilted.
When I was little, geologists worked out Earth's surface was made of pieces, like a giant puzzle. Those pieces, called “tectonic plates”, move and bump into each other and mountains form.
The United Nations Declaration on sustainable development stresses "leaving no-one behind," but what about the factors that cause many to be behind in the first place?
The Earth's core is cooling down, and one day it will be completely solid – when that happens, Earth might look a lot like Mars.
Rapid environmental decline is a major threat, yet education is not mobilised to empower children. Fortunately, many initiatives explore how to make students actors of the ecological transition.
The Open Air project features satellite data interpreted and coloured to produce beautiful, surreal images of Australian landforms.
Despite the American Indian Religious Freedom Act, passed by the US Congress 40 years ago, Native Americans still struggle to protect public lands where they practice their religions.
Compared to Earth, more "oomph" is required to bring magma to the surface of Mars, and this is probably why we haven't seen any recent eruptions on the red planet.
Nearly 50 years since the first man walked on the moon, our morals are still stranded on Earth.
To answer this tricky question, we have to look back in time to when the Earth was born, 4.5 billion years ago.
Children will be responsible for the future protection of our fragile planet. Their knowledge and engagement are critical.
A public meeting of flat earthers is a product and sign of our times.
Indigenous communities lived in the Amazon for thousands of years without chopping down their forests.
The wired Earth of the 21st century is at the mercy of the volatile nature of the sun.
China's Tiangong-1 space station is hurtling around Earth out of control and about to come crashing down. It's just one of thousands of pieces of space junk left orbiting our planet.
Scientists believe since 2010 we have entered the sixth period of mass extinction. CO2 emissions will change the lives of plants and animals in the next three to four decades.
When and where you see the Moon in the daytime depends on what phase it is in.
A solar day is a measure of how long it takes the Earth to rotate from one noon to the next, and today's summer solstice also happens to be the longest solar day of the year.
Imagine the Earth pulling everything it is made up of, all of its mass, towards its centre. This happens evenly all over the Earth, causing it to take on a round shape.
How exactly do the stars twinkle in the night sky? As it turns out, the answer is full of hot air... and cold air.