11.   New discoveries are being made all the time.

12.   The boundaries of physics constantly change as new discoveries are made, e.g. the discovery of new fundamental particles.

13.   The discovery was made almost by accident.

14.   They made their discovery while experimenting with photosensitive drugs.

15.   To enhance our chances of making such discoveries many of us use maps of one kind or another.

16.   In that year, two momentous discoveries were made.

17.   This century man has made many discoveries about the universe -- the world outside himself.

18.   Like a scientist bent on making a discovery, he must cherish the hope that one day he will be amply rewarded.