Today, the universe is 10 times warmer than it was 10 billion years ago. Back then, the average temperature of deep space was around 200,000 Celsius (360,000 Fahrenheit). Now its roughly 2 million C (3.6 million F). Scientists are searching for the reason and what it really means.

On December 14, the first Americans got a vaccine designed to protect them from COVID-19. Health-care workers were put at the head of the line to get these shots. So were older adults living in care facilities. What about kids under age 16? They won't be getting the shots. At least not yet. However, plenty of doctors are anxious to see that change.

Sadly, bits and pieces of plastic are turning up all over, including in the snow on Mount Everest! Researchers found plastic in snow scooped from a spot 8,440 meters (27,690 feet) high, near Everest's summit.

Take a sip of lemonade and you taste an explosion of flavor. The sweetness of the sugar and the sourness of the lemons burst on your tongue. But the tongue does not taste all by itself. It needs the brain to take chemical signals from food and turn them into what we sense as sweet and sour. Scientists didn't quite understand how taste got mapped in the brain. Until now...

The cameraman zooms in on the anxious elephant, who paces back and forth. However, the pachyderm's demeanor instantly calms down upon hearing a soothing ballad from Disney's Cinderella by none other than American singer and actress Cher. The now viral video was the culmination of the pop singer and animal activist's quest to save Kaavan - "The world's loneliest elephant."
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