Because of this, penguins are less contaminated with mercury than toothed whales, giant petrels, and other predators higher in the food web. The scientists, who used X-ray absorption spectroscopy ...

Mercury is extraordinarily toxic ... by liquid nitrogen and shielded from light—to SSRL for X-ray absorption spectroscopy measurements. There, SSRL associate scientist Macon Abernathy used ...

A scientific tool that can do the same thing is called a spectroscope (early spectroscopes used prisms). You can make your own spectroscope by following the instructions shown below! Assemble the ...