Has The Extinction Event Already Begun For Minority Subjects In UK Education?

I was recently explaining to my students that the asteroid that killed the dinosaurs was not the only event that caused their demise. For thousands of years the climate had been changing, resources such as water and food were becoming scarcer and volcanic activity was changing the atmosphere. That is not to say that the asteroid did not play a part, it just did not result in all dinosaurs dying the day after impact. It would have been a long drawn out process over millennia and generations. It w