| Answer | Crossword Clue |
|---|---|
| ALDA | "Scientific Frontiers" star |
| ALDA | "Scientific American Frontiers" host |
| ALDA | Host of "Scientific American Frontiers" |
| ALDA | Alan who hosts "Scientific American Frontiers" |
| ALDA | Host of PBS's "Scientific American Frontiers" |
| ALDA | Longtime host of "Scientific American Frontiers" |
