The Earth’s core consists of two parts: a solid inner iron core with a radius of 1,220 kilometers (slightly smaller than the Moon), and the outer core, a 2,500-kilometer-thick molten iron shell. The depth, pressure and temperatures of the core do not make it possible to access it by any technical means. That is why there are many questions both about its composition and its mechanisms.

From willow bark to mosquitoes, nature has been a source of vital medications for centuries. But species die-off caused by human activity is putting this at risk

Wild sandalwood populations in Australia have been slowly collapsing for decades. New research found the Western Australian government has been warned repeatedly for a century.

On any given day the water crisis remains invisible yet ever present. Today on the west coast it’s not just evident, it’s tragic.

We’re among the thousands boycotting the UN food summit – it’s been hijacked by corporate interests while the voices of small-scale farmers go unheard

Poverty Point in northern Louisiana is one of the first US civilizations on record, inhabited by a community of Native Americans as early as 1700 BCE. In a new study, researchers have shown these inhabitants to be highly skilled engineers, rather tha

Climate change has been accumulating slowly but relentlessly for decades. The changes might sound small when you hear about them—another tenth of a degree warmer, another centimeter of sea level rise—but seemingly small changes can have big effects on the world around us, especially regionally.

Here’s what’s going on inside their veins

The use of many chemical fumigants in agriculture have been demonstrated to be harmful to human health and the environment and therefore banned from use. Now, in an effort to reduce waste from the agricultural industry and reduce the amounts of harmful chemicals used, researchers have investigated using organic byproducts from beer production and farming as a potential method to disinfest soils, preserve healthy soil microorganisms and increase crop yields.

Our research is deeply concerning because it signals there are no quick fixes to the ongoing fire crisis afflicting Australia, which is being driven by relentless climate change.

Images intended to help open up the outback to mining following World War II instead deliver a lesson from the last generation of Indigenous people to live in the Great Sandy Desert on how to protect life and the land.

There are several ways that surface gravity on Earth could change. We wouldn’t like most of them. If a mini black hole collided with Earth and didn’t pass straight through, it would sink to the planet’s centre. Gravity would soar as the entire planet is pulled into the hole. It would probably get very hot too, so no one would survive to see the final spaghettification as we got within a few kilometres of the hole, when we are pulled apart by intense gravity gradients.

If someone asked you what the worst year in human history was, what would you guess? 1347 CE was pretty bad. That's the year the Black Death seriously hit Europe. Any of the years of the Holocaust, between 1941 and 1945. Or 1918, the year of the star

One of the most common misconceptions about sign language is that it's the same wherever you go. That's simply not the case. With that in mind, let's take a look at 9 examples of sign languages from around the world.

Pristine areas in the Amazon and Siberia may expand with animal reintroductions, scientists say

Scientists have devised a new way of looking at habitat loss on Earth, finding that 97 percent of Earth's land area may no longer be ecologically intact.

The scorching destruction of Australia's Black Summer bushfires between 2019 and 2020 provided an ominous glimpse of fire's reach in our hotter, dryer world, and the impact of the unprecedented inferno is still being measured.

If you bought it, it’s yours and you should be able to get someone to mend it whether it is a tractor, a phone or a trebuchet

The fast-growing tree, native to China, is also a "motel" for harmful non-native insects, like the spotted lanternfly.

Hundreds of people are evacuating coastal areas after a series of quakes shook the region.