Life on a Young Planet (56 page)

worms: annelid,
168
–
169
,
180
,
194
; pogonophoran,
174
; polychaete,
186

Wray, Greg,
200
–
201

Wright, Sewall,
114

Xiao, Shuhai,
144
,
146
–
147

Yangtze Gorges, China,
140
–
142
,
144

Yellowstone Park,
30
,
56
,
59
,
91

Yin Leiming,
146

Young, Grant,
210

Zahnle, Kevin,
104

Zhang Yue,
148

Zhang Yun,
146
,
149

zircon,
54
–
55

Zuckerkandl, Emile,
23