Who is Mr. Scott, anyway?

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1.
TWIN
2.
HUSBAND
3.
NATURALIST
4.
CLIMBER
5.
ADVENTURER
6.
GUIDE
7.
TEACHER
8.
BIOPHILE
9.
WEIRD
10.
ENERGETIC
11.
PLAYFUL
12.
PERSISTENT
13.
IMPATIENT
14.
STUBBORN
15.
SPANISH
16.
MARYLAND
17.
VIENTAM
18.
SOUTHKOREA
19.
AMERICORPS
20.
NOLS