According to conventional wisdom, the compound microscope was invented at the beginning of the seventeenth century and made possible the immediate discovery of cells. This is nonsense. The textbook ...

A home machinist and microscopy enthusiast has documented a detailed technical conversion of a scanning electron microscope (SEM) into a transmission electron microscope (TEM), demonstrating that ...

Is it possible to predict the composition of a microgram-sized salt deposit solely from its macroscopic appearance? While the task seems intractable, we show that for pure aqueous salt solutions dried ...