The PIT maneuver, or precision immobilization technique, is a pursuit tactic by which a pursuing car can force a fleeing car to abruptly turn sideways, causing the driver to lose control and stop
They are likely marketing it as a safer replacement for the PIT maneuver. Maybe not as safe as spike strips.
Half of the respondents were sourced through student moneysaving website Studentbeans.com, and half through a broader youth research panel.
You ask people at a money saving web site and they will choose the cheeper thing. Used books are way cheaper than ebooks. If you asked Amazon shoppers you would get a different answer.
Probablilty of life bearing rock ejected from earth reaches Europa is: 2.8E-6 ± 5.0E-7 %
Including all rocks that were ejected they believe 6 plus or minus
The 20,000 Kg number comes from those 5 to 7 rocks.