In Ferris Jabr’s “Early mammals were brainy and nosy,” (New Scientist, 19 May 2011), we learn:
The evident importance of smell and touch to these tiny proto-mammals hints at their lifestyle. The 190-million–year-old animals probably navigated dark burrows and skittered through leaf litter hunting insects – activities greatly helped by sensitive smell and touch.
And thus they avoided dinosaurs, except that
Having a great sense of smell is also consistent with the idea these mammals may have been nocturnal,” explains Rowe. Despite recent evidence of nocturnal behaviour in dinosaurs, it’s generally thought that most of these animals were active at day and asleep at night. “That’s when the mammals came out. With a great sense of smell, it doesn’t matter if it’s dark,” he says. “Smell might be what made it possible for early mammals to come out and find food and mates. In the early Jurassic, that was what drove their evolution.
Tenured prof: Ignore competing lines of evidence. Only boobs and creationists consider such things.