An explorer injured at the bottom of Germany’s deepest cave 12 days ago has re-emerged after a rescue operation involving 728 people from five countries and estimated to have cost several million euros. The Riesending cave complex being closed for good. Read more here

Photo: Markus Leitner/AP

An ashcloud has grounded flights between Australia and south-east Asia, and all domestic flights from Darwin airport in the north of the country.

The cloud, which was caused by the eruption of Sangeang Api in southern Indonesia on Friday evening, has drifted across central Australia, according to Reuters. Full story here

Photo: Sofyan Efend / HKV / Barcroft

The week in wildlife: A goldsmith beetle (Cetonia aurata) files over stone-breaker (Saxifraga) flowers in a garden outside Moscow. (Yuri Kadobnov/AFP/Getty Images)

Photos of the day: Sulo Karjalainen, known to many as the “bearman” is affectionately licked by one of his bears, in Kuusamo, Finland. The 73-year-old runs Kuusamo Large Carnivore Centre with his brother Jalo, which has been home to more than 20 orphaned brown bears. Photograph: Pasi Jantti/Barcroft Media

Next month, scientists will meet to mark the 150th anniversary of the discovery of the La Madeleine mammoth – an engraving on ivory that proves man had lived alongside these prehistoric creatures. More of this story

Photograph: Matt Dunham/AP

Top 10 new species of the past year – in pictures

The skeleton shrimp, Liropus minusculus, is the smallest in the genus. It was identified from among specimens collected from a cave on the island of Santa Catalina, off the coast of Southern California. Photograph: SINC and JM Guerra-Garcia/PA

The Oldest Living Things In The World, by Rachel Sussman 

This 9,550-year-old spruce gran picea is, Rachel says, “a portrait of climate change”: as the plateau upon which it lives has warmed up, the tree has grown taller. See more photos 

Jamaica’s rare wildlife – in pictures

The Portland Bight protected area is home to the iconic Jamaican iguana and 20 other endangered species. It’s fragile coastal ecosystem and wildlife faces the risk of being lost forever as Jamaica approves a Chinese company to build a port. See more photos

Photograph: Robin Moore

Cherry blossom - your pictures so far

Here is a selection of some of the stunning contributions we’ve seen so far on our cherry blossom assignment, submitted via GuardianWitness. There’s still time to share your own pictures »