Recently, researchers have shown that natural gas can form rapidly<ref>O’Donnell, E. 2005. “Rocks into Gas.” Harvard Magazine 107, no. 4.</ref>, and that some is still being formed. | Recently, researchers have shown that natural gas can form rapidly<ref>O’Donnell, E. 2005. “Rocks into Gas.” Harvard Magazine 107, no. 4.</ref>, and that some is still being formed. |