You can take the person out of nature, but you can't take nature out of the person. The latest scientific thinking tells us that even in the modem workplace, we're still at the mercy of basic biology. Consider the workweek. For inalienable biological reasons, Monday tends to be the least productive day for most people. 'It's simply natural to feel stress when making the transition from pleasurable engagement back into work,' says Arnold Brown, principal at Weiner Edrich Brown, a New York City trend-tracking firm that culls scientific findings with workplace implications. He's come across a study, meanwhile, that shows Tuesday is our most productive day, falling after the Monday do ldrums and before a pre-week-end slump that builds throughout the rest of the week. We also can't shut out input from our senses. For example, findings show that our sense of smell is closely tied to memory. Brown's workplace tip: Dab on a bit of scent--any scent--while you're practicing a speech. When you deliver it, put on the same scent, and your recall will be improved. Studies also show there's no substitute for natural light. It triggers our brains to produce serotonin, which makes us awake and alert. 'Why are meeting moms often deep inside buildings, with muted light?' asks Brown. 'Are we telling executives, 'let's not think about things'?' By the first sentence, the writer means that ______.