![]() | Engineering Animals Denny Mark : Mark Denny is a retired aerospace engineer and the author of Froth: The Science of Beer .McFadzean Alan : Alan McFadzean is an independent consultant. |
![hidden image for function call](https://upload.wikimedia.org/wikipedia/commons/c/ca/1x1.png)
![]() | Engineering Animals Denny Mark : Mark Denny is a retired aerospace engineer and the author of Froth: The Science of Beer .McFadzean Alan : Alan McFadzean is an independent consultant. |