400,000 years ago an "interglacial hominid" - homo erectus - stood here on the high, dry ground above a soggy river valley and looked out to where the first glacier had stopped just short of today's London and poured out its mass of sand and gravel.
He looked, and dropped his bag of tools.
A second glacier came, stopped and washed out its sand and gravel.
Homo erectus evolved into homo sapiens. He discovered the science of metallurgy and the principles of mathematics, developed the science of glass making and optics and electronics, and made up games like football to amuse himself.
Modern engineers then built the brand new Wembley Football Stadium (the home of football) on the spot where the glacier had stopped and poured out its gravel.
I came, and stood on the very spot where archaeologists had found the "hominid's" abandoned bag of tools and took this photo of the Wembley Arch. The tool bag had no name tag inside, so cannot be returned.
The arch is about 7 miles distant. In the photo you can also see the surrounding structure of the rest of the new stadium. The detail that can be seen is a remarkable tribute to the science of opitcs and lens making.
(With acknowledgement to David McDowall and his "the Walker's Guide to Richmond Park" - an excellent little pocket book.)