The principal semiconductors are silicon and germanium; silicon’s abundance in the Earth’s crust is second only to oxygen.
Nickel is an essential element in the human body, but too much is toxic. Here’s another element our planet had to provide.
Neanderthals were not just downing raw hunks of meat 70,000 years ago, as many of us have assumed.
Don’t walk on the grass, that “often undervalued” form of life, without looking down. It’s amazing down there.
The atomic element boron is essential for life, but how do you get it from stars to plants and animals?