Pretty much every political or corporate sensitive topic has heavy bias. Even biology related topics are subject to external pressure from journalists, politicians and activists. There have been huge fights over how fetus, gender, sex, etc are defined on wikipedia.

And it isn't just wikipedia, it's all of social media and pretty much all of the internet. From silly nonsense like movie reviews to serious matter like war footage, if it has political or financial impact, it is subject to heavy censorship and bias.