Where is the physics section in the World Panel 2.79?

I’m attempting to follow a beginner game tutorial here: https://www.youtube.com/watch?v=9uh3D_qa-6c&index=2&list=PLQL0TBLSW4eD3lFSfEqTg_wJxIhHrHnT- He shows in the World settings a Physics section. I don’t have it in my Blender version 2.79. Can someone tell me where it is?

From the tutorial:

What I have:

Blend file: http://pasteall.org/blend/index.php?id=48032

Just go one tab over to the left. The Scene Tab.

Just had the same problem xD Checked the forum immediately! Phew! xD

That solved it. I’m wondering though, when I attempted to google the problem before posting my question here, I came across the Blender 2.79 manual https://docs.blender.org/manual/en/dev/game_engine/physics/world.html It shows the physics options in the world panel. Why is that not correct?

I really appreciate (and depend on) this site to get answers to Blender questions. Thanks.