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Think "renewable energy" and the wind and sun come to mind, but someday it may be possible to add ocean energy to that list.

At MedStar Washington Hospital Center, doctors and nurses are moving as many patients as they can from intravenous medications to the same drugs in pill form.

A study published Tuesday in the journal Clinical Psychological Science finds that increased time spent with popular electronic devices — whether a computer, cell phone or tablet — might have contributed to an uptick in symptoms of depression and suicidal thoughts over the last several years among teens, especially among girls.

Since my last post was on Earth's hosting of life, it's natural to follow with a discussion of life elsewhere.

From the outset, we must state two essential facts: first, that we have no concrete evidence that intelligent aliens have ever visited our planet; and, second, that we have no evidence that there is life outside Earth, intelligent or not.

Let's look into the alien visitation question first — and leave the question of life elsewhere for another time.

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