The four fundamental states of matter are solid, liquid, gas and plasma, but there others, such as Bose-Einstein condensates and time crystals, that are man-made.

Learn about states of matter and see what happens when they change with this interactive activity designed for the GCSE AQA physics specification.

In this interactive, adjust the temperature and pressure of three common substances and watch them morph into different states of matter.

Visualise what happens when states of matter change with this interactive activity designed for the OCR 21st Century GCSE physics specification.

Back in 1999 Penn State climate scientist Michael Mann released the climate change movement's most potent symbol: The "hockey stick," a line graph of global temperature over the last 1,500 years ...

The graph shows spikes and drops in temperature over the past 9,500 years, charting how much higher or lower each year’s temperatures are than the average temperature over the entire time period.

But they also showed the actual temperature of the planet is warmer now than it has been for 70-80 percent of the past over that time period.

The conservative National Review, which has regularly criticized and rejected the scientific consensus on climate change, tweeted the following graph on Monday afternoon. The graph is correct.

A cloud of atoms with a temperature beyond absolute zero – which is also bizarrely hotter than any positive temperature imaginable – could be a mysterious new quantum state of matter.

An effort to understand Earth’s past climates uncovered a history of wild temperature shifts and offered a warning on the consequences of human-caused warming.