He fretted about the chance of another disaster on earth, noting that something a kilometre across could kill a quarter of the human race.

ECONOMIST: Gene Shoemaker

Now, whenever we want to indulge a whim and explore the visual evidence of our quarter century on this earth, one click and we have thousands of pictures to scroll through, thousands of recollections blurring past our eyes.

FORBES: Generation Zero: Instant Nostalgia, Instant Amnesia

We have 7 billion people on Earth, a quarter of which say they understand English (yet the actual fluency is suspect).

FORBES: English - The Language of Global Business?