Historically, sharks and humans haven't been around each other a lot, especially when you think in geological time scales.

鲨鱼一直和人类并不是经常在一起，特别是当你从地质时间维度方面来考虑。

Mega tsunamis generated from a volcanic collapse like this appear to be common on a geological time scale as there is evidence to show that it's happened dozens of times in the Atlantic alone over the past million years.

在地质时间尺度上，像这样的火山崩塌引发的巨型海啸似乎很常见，因为有证据表明，在过去的百万年里，仅在大西洋就发生了几十次。