21.   The memory remains for years without a vaccine.

22.   The memories remain fresh because her story remains unresolved despite a handful of books and a limited-release film about her career.

23.   The strong memory remains of how familiar and important that lizard became.

24.   There is also anterograde amnesia, in which old memories remain intact but new ones can no longer be formed.

25.   Their memories remain vivid a half-century onward, for it was the day the world had dreamed of.

26.   Theirs was the last Olympics not to appear on television in the United States, but the memories remain in widescreen, high-definition, crystal clarity.

27.   Those memories remain.

28.   Those times, those days, those people are now all part of the past, but my memories remain sharp and clear.

29.   Though Garrett has spent much of his life without a father, the memories of him remain fresh.

30.   Too many years have passed, he said, for witness memories to remain reliable.