Elon Musk and Bill Gates have bickered over everything from climate change to th...

• Elon Musk and Bill Gates don't seem to agree on climate change, the pandemic, or space travel.

• They've made public jabs at each other for years in interviews and on Twitter.

• Musk recently took issue with Gates shorting Tesla, saying Tesla is "doing the most" on climate change.

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Bill Gates and Elon Musk don't exactly see eye to eye.

While the Microsoft billionaire and the Tesla and SpaceX titan have never seemed to have a particularly cozy relationship, things have heated up over the past few years as the two have openly sparred about everything from electric vehicles to the pandemic.

The two moguls are among the world's wealthiest, with Musk in 1st place and Gates in 4th, behind Amazon founder Jeff Bezos and LVMH Chairman Bernard Arnault. While their public spats may not always be serious, they do appear to fundamentally disagree on how to fight disease; climate change; cryptocurrency, and the importance of space travel.

Here's where the friction between Gates and Musk began and everything that's happened since.

Things first became tense between Gates and Musk in 2020. At the time, they were both involved in fighting the coronavirus — Gates pledged hundreds of millions of dollars to fight the virus, while Musk was working to source and produce ventilators. Musk had also teamed up with the German biotech firm CureVac (in which Gates is an investor) to make a device to aid in vaccine production.

Source: Insider, Insider, Insider

But Musk was also frequently downplaying the severity of the virus and strongly criticizing stay-at-home orders. He'd promoted the malaria drug hydroxychloroquine as a treatment, falsely said that children are immune to the virus, and questioned coronavirus-deaths data.

Source: Insider, Insider

Gates took issue with Musk's behavior regarding the virus. "Elon's positioning is to maintain a high level of outrageous comments ... I hope that he doesn't confuse areas he's not involved in too much," Gates said on CNBC's "Squawk Box."