average

"For ten civilizations to exist at the same time as ours, the average lifetime must be above 10 million years," says Scherf.

Many younger investors only know a time when stocks have returned on average about 14% a year, well above historical norms.

They had the second-best batting average with runners in scoring position, as well.

Fertility rates—the number of babies a woman will have in her lifetime on average—are falling and in many countries have dropped substantially below the 2.1 level needed to keep populations stable without immigration.

At his former school in Morbi, teachers called Mr Majothi an "average student" but deeply motivated to fulfil his mother's dreams through education.