The second issue of Food Security is now published, and is free online. It documents some of the multiple causes of food insecurity.
Helium can be found in underground deposits in the earth. Helium can also be found in stars and other planets. The helium underground - and extracted from natural-gas - is a by-product of the natural radioactive decay of uranium, though is far too stable to be radioactive itself. It also occurs in very small amounts in the atmosphere.
Mark Holm/The New York Times/Redux/eyevine. The United States maintains a strategic helium reserve in a geological formation near Amarillo, Texas. The US House of Representatives voted unanimously on 25 September to delay closing the world's only strategic helium reserve, averting a potential supply crisis. But the move will not make life much easier for US researchers who are already struggling to cope with rising helium costs.