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The photo seems to show a layer of the same material as the exploding core between the layers of spheres. I presume it's gun powder.

Tell me a single good social app from Google. I'll wait. It's not like they didn't try, but all of them seem to suffer from the design by committee syndrome.

The discovery tab (For You) is awesome. Its the first social app where the discovery tab is better than your feed, so much more that you can actually use it without following anyone. It's quite addictive too, you can easily spend half an hour watching videos.

The way the discovery tab works also created a meta game: Alt TikTok, Deep TikTok, Elite TikTok, ...

The exclusivity aspect is there too, very few users are over 30, but it's not the driver.