But it wasn't until the late 1700s -- when Scottish geologist James Hutton, who observed sediments building up on the landscape, set out to show that rocks were time clocks -- that serious ...

Tony Craig, Head of the Social, Economic and Geographical Sciences, The James Hutton Institute. Ivan Clark, Nature-based Jobs, and Skills Manager, NatureScot. Judith Ralston, BBC Scotland.

But it wasn't until the late 1700s -- when Scottish geologist James Hutton, who observed sediments building up on the landscape, set out to show that rocks were time clocks -- that serious ...