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Tesla's Next Big Product Is Coming On April 30: Batteries

When Elon Musk makes his next big announcement later this month he won’t be joined by an electric car or a space-bound capsule. Tesla will finally be passing along details on its long-awaited batteries designed for home use, plus a “utility-scale” battery as well—both of which will likely be manufactured in its new… » 4/21/15 7:56pm 4/21/15 7:56pm

What Biofuel Is (And Where It Comes From)

Cars didn't always run on gasoline. Henry Ford envisioned his Model T's puttering along with tanks fully of ethanol. Early diesel engines ran on peanut oil. Of course, the discovery of massive petroleum reserves at the turn of the 20th century quickly put the brakes on that notion—why bother creating biofuel when… » 6/12/13 4:07pm 6/12/13 4:07pm