Earth's inner core may actually have two distinct layers. (alexlmx/Canva Pro) "We found evidence that may indicate a change in the structure of iron, which suggests perhaps two separate cooling events ...
Afterwards, polyurethane was dried at 50°C for 24 h. The dried polymers were analysed by attenuated total reflectance - Fourier transform infrared spectroscopy (ATR-FTIR) to evaluate the chemical ...