. >> reporter: immensely important when btrying to link the past ad future like this. for mary williams-wagner, finishing it will be an effort. >> we still need to discovery all of the descendants. >> reporter: derrick ward, news4. >>> if you suffer from allergies, we don't have to tell you, the last few weeks have been as bad as it gets. pollen every. news4's shomari stone went to the doctor. >> hi, how are you? >> good, how are you? >> reporter: scott keller is getting an allergy shot at the institute for allergy in chevy chase. >> it's crazy. i can feel it. >> reporter: tree pollen is bad this week. >> i want to rip my eyes out of my head, my teeth feel like they want to come out of my mouth. >> reporter: you've probably seen the yellow, greenish powder covering outside tables, cars, and suvs. allergy season peaked over the weekend. and it looks like the pollen isn't leaving anytime soon. just ask news4 meteorologist tom kierein. >> this is the time of year we have our average highest pollen counts. this is when the trees are producing all their leaves. >> house doo