Samantha Peña

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The Scary American Bat Die-Off

FYI: Just How Old is Dirt?

Really, really old<p>"It depends on what you mean by dirt," says Milan Pavich, a research geologist with the U.S. Geological Survey.<p>"The oldest sedimentary rocks are about 3.9 billion years old—they're in Greenland—and at one time, they were dirt. That's pretty close to the time the Earth formed."<p>But …

Effective new malaria vaccine offers hope for breakthrough cure

An experimental malaria vaccine called PfSPZ is showing promise after it was found to have blocked the disease in early clinical trials, according to a new study published by <i>Science</i> magazine on Thursday. Researchers are calling the vaccine a breakthrough while also cautioning that PfSPZ isn't ready …

Dolphins Know Other Dolphins By Name Even After Decades Apart

Even humans have trouble remembering the names of people they met 20 years ago. But not dolphins!<p>Last month, a study indicated that dolphins call each other by names, of a sort: they have a particular whistle unique to each dolphin, and when a dolphin hears its own whistle-name called, it responds. …

Old Hawaiian Menus Tell Story Of Local Fish And Their Demise

In the early to mid-1900s, the islands of Hawaii were a far-away, exotic destination. People who managed to get there often kept mementos of that journey including kitschy menus from Hawaiian fine dining restaurants and hotels like like Trader Vic's and Prince Kuhio's.<p>Now these old menus are …