This sun-chasing robot looks after the plant on its head

Back in school I remember learning that plants are “heliotropic,” meaning they grow towards light. I always found this oddly touching; as if those green tendrils stretching out to the sun proved the plant itself was yearning to live. And why not? That is why they do it.
But what if plants could do more than stretch? What if they could move like animals, independently of their roots? Evolution hasn’t got there yet, but it turns out humans can help. Chinese roboticist and entrep