I believe the answer you are looking for has to do with cells, they are the basic building block of life and are the smallest life that can support itself.
Whatd did she discover?? it doesnt make sense
The spectrum<span> of </span>electromagnetic radiation<span>, including visible light, which </span>radiates<span> from</span>stars<span> and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies</span>
