At first glance, musk mallow (Malva moschata) seems like a highly attractive plant. Its blooms are a pretty pink, and crushing its foliage leaves your fingers covered in a pleasant, musky fragrance.

"The reason I slept on the floor was not because I couldn't go across the road and be at a hotel," Musk said in a Bloomberg interview in 2018. "It was because I wanted my circumstances to be worse ...

His latest target? The lithium-ion battery pack in the Nissan Leaf, about which Musk had some critical things to say in a conference call with investors this week. If there's ever going to be a ...