Originally posted by whodey
Could planet X be responsible for the periodic mass extinctions on earth about every 30 million years?
And are we not due again?
The article actually says 27 million years.
The dinosaur extinction event was 66 million years ago.
Therefore the next scheduled extinction event is in twelve million years. We are almost exactly half way between extinction events (assuming the periodicity of such events is real).
So no, we are not due again just yet.