21.   The diversity of prairie plants and their adaptations to the climate and soils may hold invaluable secrets for agriculture and medicine.

22.   The findings, by Dr. Lisa Frenkel, quashed the hopes of some scientists who had hoped the resilient infants might hold the secret for a new AIDS vaccine.

23.   The rivers are dark, the marshes mysterious and the gnarled live oaks with their filigree of silvery moss hold ancient secrets.

24.   They have suggested that Berezovsky holds secrets that could ruin the Yeltsin presidency.

25.   Though security measures are closely held secrets, we know the trucks are tracked by satellite.

26.   What, exactly, do you say to someone who may hold the secrets to the universe?

27.   And police quickly found the murder weapon in the house across the street, the house that held the secrets she had tried to protect.

28.   Experts say Lake Issyk-Kul in Kyrgyzstan, once home to the top Soviet torpedo-testing center, still might hold valuable secrets.

29.   He was confident that cobra venom held the secret to curing or maybe even preventing disease.

30.   He says the Dakar is unlikely to hold any secrets.