A bus powered by cow manure (biomethane) is grabbing attention for hitting high speeds. The BBC reports that Reading Buses' "Bus Hound" was recently clocked at going 77-miles per hour at England's Bedford Millbrook Proving Ground.  
While the UK Timing Association says the speed is a record for a standard bus, a Reading Buses executive says Guinness World Record won't count it because it didn't reach 150-miles per hour. 

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