Sometime this morning, during your shower or at work, you probably did a mental run-through of your day. You decided when you'd tackle various tasks and errands. Perhaps you vowed to hit the gym at lunchtime. Maybe you plotted to get out of something. The one thing you forgot to plan for: happiness.
Read MoreEvolutionary psychologists believe that we see flowers and plants as a subconscious cue of safety ("Things can grow here-let's set down roots"), reward ("All that foraging paid off") and promise ("These buds mean that fruit is on the way"). So the sight of a colorful bouquet in the morning, they theorize, can convince you that everything's coming up roses today.
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