Study shows the power of 'thank you' for couples

Gratitude has been a trendy sentiment in recent years—sparking an industry of journals, knickknacks and T-shirts touting thankfulness as a positive force in individuals' lives.

Four science-based ways to tell if your cat loves you

Even the most devoted cat owners wonder at some point, perhaps waking up in a cold sweat in the middle of the night, whether their cat really loves them. Dog people like to smugly point out dogs' long history as humankind's ...

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