1.   The exact nature of black holes continues to baffle scientists.

2.   For years this anomalous behaviour has baffled scientists.

3.   A growing body of research has suggested that prayer and meditation appear to be beneficial in the healing process, although scientists are still baffled by this alternativce approach.

4.   The case baffled scientists and helped cement new theories about the human brain.

5.   The moon illusion has baffled scientists since antiquity, the Kaufmans said in separate telephone interviews.

6.   The plants are a botanical enigma, baffling scientists as to how they develop their unusual shapes.

7.   The relation between stress and the immune system has baffled scientists for decades.

8.   The so-called weekend effect has been rising in recent years, baffling scientists until now.

9.   His claim has baffled scientists, excited investors and brought the inventor death threats from people trying to steal his formula.

10.   His formula has baffled scientists, excited investors and brought himself death threats from people trying to steal his formula.