You know that what you eat affects your sleep, but did you know that the reverse is also true? Studies now show that people who are sleep deprived tend to eat more fat-rich foods, simple carbohydrates, and fewer vegetables, possibly because sleep loss alters chemical signals connected to metabolism and hunger.
Figure 6. Figure 6 is a bar graph showing the number of main-track train derailments and the number of main-track train collisions per year from 2001 to 2010. In 2001 there were 7 main-track train collisions and 132 main-track train derailments.
A train derailment in Louisiana on Saturday spilled nearly 10,000 gallons of hydrochloric acid and forced more than 3,000 people to evacuate their homes. In the past few weeks, derailments have also occurred in southwestern Pennsylvania, on the Boston T, and on the New York City subway. What causes trains to derail?