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3 results for “formation”.

• What Your Blood Pressure Numbers Actually Mean
  "120 over 80" is one of the most quoted health numbers there is, and almost no one is told what the two figures really measure. Blood pressure is a live reading of the force your heart exerts on your arteries — and understanding the two numbers turns a scary reading into useful information.
• How Football Tactics Evolved — From the Pyramid to the Gegenpress
  The formation numbers commentators bark about are fossils of real battles: every system existed because it beat the last one, and every counter existed to break it. A century and a half of football shape, told through the six revolutions that still define what you watch on Saturday.
• Comets: How Icy Visitors Build Their Tails, and When You Can See One
  A comet is a snowball the size of a town that grows a tail longer than Earth's orbit on the way to meet the sun. Here is the physics of the two-tailed transformation, where these visitors come from, and how to plan a night around one.