GWD求解答！

ChristySuen

又来向大家请教一下啦！！大家帮帮忙！

Unearthed in China, fossils of feathered dinosaurs offer the most dramatic evidence yet discovered of the close evolutionary relationship between dinosaurs and birds.

这句话是对的，可是我不是很理解划线部分的语法结构，这里yet做连词吗？ discovered后面可以搭配of？
求大家帮忙解答一下！谢谢