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Underwater unknown

Paleodictyon

A strange honeycomb pattern appears on sea ridges around the world. We think that it is created by living creatures, but no-one has ever seen one. Oh, and there are fossils of the patterns going back 500 million years.

Great Green Wall

Senegal reforestation

It’s no surprise that one of the ways we’ll fight climate change is to plant a lot of trees. Across the entirety of northern Africa, millions of trees are being planted to help, and also to hold back the spread of the Sahara.

Elephant justice

Topsy

Topsy the elephant was famously electrocuted in 1903. History has not been kind to her, so let’s set the record straight. No, she was not a victim of the AC vs. DC wars. No, she was not a killer elephant. Yes, she killed one man, but in clear self defence. 

Elf ring

Fairy Ring

Ever see a set of mushrooms growing in a near-perfect circle? Or an arc of dead or dark grass on a green field? Folklore calls it the elf ring or fairy ring, but it actually has a very reasonable biological explanation.

Immortal dog

Husky

Some time more than 200 years ago, a dog or wolf in China or Siberia got cancer. It was a strange type of cancer: the cancer cells were contagious. That cell line is still alive today, and will probably be alive forever.