Gram staining. Gram staining or Gram stain, also called Gram's method, is a method of staining used to differentiate bacterial species into two large groups (gram-positive and gram-negative). The name comes from the Danish bacteriologist Hans Christian Gram, who developed the technique.
Horizon Oil Sands. Horizon Oil Sands The Horizon Oil Sands project (or Horizon) is an oil sands mining and upgrading project. Horizon is 100% owned and operated by Canadian Natural Resources Limited.
Deepwater Horizon oil spill, USA (2010) The Deepwater Horizon oil rig disaster occurred in April 2010 in BP's Macondo oil and gas prospect in the Gulf of Mexico, spewing 4.9 million barrels of oil, the world's biggest offshore oil-spill disaster to date.