2.  Data from space may disprove the
common belief that dinosaurs were
killed by an asteroid
 The current theory is that a large
asteroid called Baptistina collided with
another rock, throwing out huge
fragments into the Solar System.

3.  new data from the Nasa-run Wise
telescope suggest that the Baptistina
fragments are just far too young.
 The candidate asteroid, Baptistina, is
thought to have collided with another
asteroid in the "main belt" between Mars
and Jupiter, around 160 million years
ago.

4.  Critically, the Baptistina family of
asteroids - those that were formed when
the larger asteroid destructively entered
the main belt - were only formed around
80 million years ago.
 This gives the dinosaur-killing rock only
15 million years to move into a suitable
place to be flung out of the main belt
and to travel to Earth in time for the
impact 65 million years ago

5.  http://www.bbc.co.uk/news/science-
environment-15006647