Captain America in Nigeria, and more trending topics of the week

The Nigerians speculating how Captain America could help their country, and the 15-year-old who may (or may not) have discovered a lost Mayan city.

Find out about these stories and more in BBC Trending's weekly roundup. You can also listen to our radio programme here.

Picture credits: Twitter / @infenwa_ayobami; @daXclusiveCEO; @Yayaa__Ze; Canadian Space Agency; Reddit / StarMoses1; its_zoj_y0; Twitter / @RichieBrave; @Saraswati; @bree__cheese.

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