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 __   __     ___     _    _    _    _    _    _   
 \ \\/ //   / _ \\  | |  | || | || | || | || | || 
  \   //   / //\ \\ | |/\| || | || | || | || | || 
  / . \\  |  ___  |||  /\  || | \\_/ || | \\_/ || 
 /_//\_\\ |_||  |_|||_// \_||  \____//   \____//  
 `-`  --` `-`   `-` `-`   `-`   `---`     `---`

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Text this: On the coalescence speed of bubbles