In 1902, the Siemens company developed a tantalum lamp filament. These lamps were more efficient than even graphitized carbon filaments and could operate at higher temperatures. Since tantalum metal has a lower resistivity than carbon, the tantalum lamp filament was quite long and required multiple internal supports. The metal filament had the property of gradually shortening in use; the filaments were installed with large loops that tightened in use. This made lamps in use for several hundred hours quite fragile. Metal filaments had the property of breaking and re-welding, though this would usually decrease resistance and shorten the life of the filament. General Electric bought the rights to use tantalum filaments and produced them in the US until 1913.
When did GE cease production of the tantalum light filament?
1913

An investigation by ProPublica found that at least 21 doctors have been paid more than $500,000 for speeches and consulting by drugs manufacturers since 2009, with half of the top earners working in psychiatry, and about $2 billion in total paid to doctors for such services. AstraZeneca, Johnson & Johnson and Eli Lilly have paid billions of dollars in federal settlements over allegations that they paid doctors to promote drugs for unapproved uses. Some prominent medical schools have since tightened rules on faculty acceptance of such payments by drug companies.
Billions of dollars have been paid by which companies?
AstraZeneca, Johnson & Johnson and Eli Lilly

The Cubs' current spring training facility is located in Sloan Park in |Mesa, Arizona, where they play in the Cactus League. The park seats 15,000, making it Major League baseball's largest spring training facility by capacity. The Cubs annually sell out most of their games both at home and on the road. Before Sloan Park opened in 2014, the team played games at HoHoKam Park - Dwight Patterson Field from 1979. "HoHoKam" is literally translated from Native American as "those who vanished." The North Siders have called Mesa their spring home for most seasons since 1952.
When did Sloan Park open?
2014