Here's the HTML structure based on the provided specifications: ```html Sci-Fi Encyclopedia

Sci-Fi Encyclopedia

Holographic Globe

Featured Article

Explore

Recent Events

Did You Know?

Community Portal

About

Title of the Article

Introduction: A brief overview of the subject.

Section 1

Section 2

``` Make sure to replace `"holographic_globe.png"` with the actual path to your holographic globe image, and link the stylesheet `"styles.css"` accordingly. You can then populate each section with the relevant content based on your needs.