Wow, I have to give kudos to the natgeo web dev/team that implemented this. This was a flawless read on mobile, and that's a rarity for me anytime a site tries to get fancy, the scrolljacking and anti patterns make it just workable enough to be frustrating.
This took some skill, and a mandate from someone to be not just device friendly, but as close to a native feel I've seen possible with web views. Kudos.
I like the way it display thing, good job, the scroll experience is nice and smooth. I've even learn pluto has moons :O.
(but sad that distance are in Miles only...)