Scientists say Earth is on the brink of crossing critical climate tipping points, from melting ice sheets to dying rainforests. Once triggered, these changes could accelerate global warming and be ...

At room temperature it is body-centered cubic, between 912 and 1394 C if is face- centered cubic, and between 1394 and its melting point at 1538 C it returns to body-centered cubic. Low carbon steel ...

While CO2 gets the spotlight, black carbon's potent, short-lived warming effect is pushing Asia's glaciers past the tipping point A dark ... Beyond melting glaciers, it also disrupts monsoon ...

THE phase diagram of the niobium–silicon system has been established by melting-point determinations, X-ray examination and metallography, and is shown in Fig. 1. Alloys were prepared in the ...

consist of very long molecules that contain chains of carbon. They too are held together ... This means that polymers have a higher melting point than many other organic molecules.