This is the Natural Selection interstellar spacecraft from the Three-Body Problem novel. In fact, the disc-shaped part is the head.

I tried to draw this logo myself, but my drawing turned out rather ugly. The lines of the Millennium Falcon closely match my imagination of the Natural Selection spacecraft's appearance, so I borrowed its lines.

However, this is not permanent. In fact, the name “Nature” may be modified because it is not SEO-friendly.