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...working. Normally, you would identify the culprit by growing the pathogen in the lab and running standard tests. But not all pathogens can be grown this way, including the one causing this illness. You are running out of options. This was the case for Ellie Irwin, who suffered from persistent inflammation and blurred vision in her right eye. Here is how a developing area...

...work on trying to find as many planets as possible around the stars closest to the Sun. Galaxies tend to fall into two groups: spiral galaxies (Figure 19), such as the Milky Way, which contain stars of a variety of ages, including young stars that are still forming elliptical galaxies (Figure 20), which contain mostly older stars and look like fuzzy blobs. Spiral galaxies...