Tetralogy of Fallot (TOF) is a combination of four congenital (present at birth) heart defects that affect infants and children. The defects occur together and change the way blood flows through the ...

Credit: NASA/JPL-Caltech There is a perception that NASA’s Mars Sample Return (MSR) mission is being delayed by indecision, but the real delay has been multiple decades of seeking a heritage ...

Unlike the iPhone example above, these prospects in financial ... or enhancing market transparency. Yes. Although pure arbitrage is billed as "no risk" and the price differences are typically ...

Jet engine production for narrow- and wide-bodied aircraft is an oligopoly, with four companies ... requirements of engine development, as a more pure-play engine manufacturer, Safran, spent ...

The purchase of a car is one example where cost comparison matters. Total cost of ownership of a car is not just the purchase price but also the expenses incurred through its use, such as repairs ...