Animals

Lizards can regrow their tails, but the new tail isn't quite perfect. Scientists have now used stem cell therapy to let lizards grow better tails – bones, nerves and all – in an advance that could have implications for better wound healing in humans.

Tardigrades are notoriously hardy microscopic creatures, but one thing they’re not good at is fossilizing. Now an exceptionally well-preserved, “once-in-a-generation” tardigrade fossil has been found in amber, and assigned to a new species and genus.

A new company called Colossal plans to revive the woolly mammoth and reintroduce the species to the Arctic. And it isn’t meant to be just a tourist-trap Jurassic Park either – the aim is to restore a long-lost ecosystem to help fight climate change.

Agriculture is a huge environmental issue in many ways, but one that’s often overlooked is livestock urination. Researchers from Germany and New Zealand have now demonstrated a potential way to reduce that problem – by toilet-training cows.

Our mental images of the extinct thylacine, or Tasmanian tiger, are tinged in greyscale, since that’s the main way we’re used to seeing them. But now, one of the most famous videos of the animal, shot in 1933, has been professionally colorized in 4K.

Wild cockatoos have been seen making sets of tools, each with their own design and purpose, and using them in a specific order to crack into fruit. This behavior places them in an exclusive club that previously only included humans and some primates.

We're big fans of the annual Comedy Wildlife Photography Awards – this contest always gives us a smile, and it's a good-hearted organization focused on conservation. Now the finalists have been announced for 2021 – here are our favorites from the crop.

Scientists have tracked the entire life of a mammoth that lived 17,000 years ago, right down to the week. By studying the isotopes in different parts of its tusk, the team figured out where in Alaska it was at any given point in its 28-year life.

Paleontologists have discovered the largest known flying reptile that ever took to the Australian skies. Named Thapunngaka shawi, this “fearsome dragon” sported a 7-m (23-ft) wingspan and a jaw full of awful jagged teeth.

Two exceptionally well-preserved cave lion cubs have been found in the Siberian permafrost. Tens of thousands of years old, the cubs are among the most complete Ice Age specimens known, allowing close examination to determine how they lived and died.

Researchers have discovered one of the oldest and best-preserved brains in the fossil record. A 310-million-year-old horseshoe crab was found with its complete brain intact, thanks to a previously unknown preservation method.

Amber is amazing at preserving insects and small creatures, but now it might have some competition – fossilized feces. A hapless beetle has become the first species discovered and described after being preserved in poo for 230 million years.