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MKC0KM white cat climbing on a tree

Why can squirrels run straight down trees? And could my cat do it too?

A reader explains the adaptations that let squirrels make this gravity-defying manoeuvre - which a cat could only dream of

Man clicking his heels while mowing a lawn

This week鈥檚 new questions

Southern Lakes Sanctuary field rangers install a line of stoat traps in the Kea Basin. Stoats are a particular threat to indigenous alpine species including Kea, Rock Wren as well as the endangered flightless Takahe which also spend time in alpine areas. Southern Lakes Sanctuary is a consortium of regional conservation groups involved in the suppression of predators that threaten New Zealand's indigenous species.

Life

Documenting the battle to protect New Zealand’s endangered birds

Comment

Anyone keen on a cat cryptocoin? Anyone?

Twisteddoodles on the incredible formation of a new material

Tom Gauld on the travails of a geologist

Athletic women doing stretching wile exercising on group training in a gym. Focus is on African American woman.; Shutterstock ID 2039901623; purchase_order: -; job: -; client: -; other: -

Health

The surprising exercises that will improve your sleep

cute miniature schnauzer dog among chamomile flowers; Shutterstock ID 167053673; purchase_order: -; job: -; client: -; other: -

Why do humans like flowers, and do other non-pollinators, too?

Origami tetrahedrons background. Futuristic polygonal composition with copy space on the left side.; Shutterstock ID 384802414; purchase_order: -; job: -; client: -; other: -

Why are at least four faces required to make a flat 3D solid?

Leopard gecko lizards on the rock, cute lizards that are easy to care for, eublepharis macularius, animal closeup; Shutterstock ID 2551815383; purchase_order: -; job: -; client: -; other: -

This week鈥檚 new questions

Which animals can recognise individual people? And does Earth鈥檚 mass remain constant?

Life

Stark images show water’s role in human strife and survival

Comment

Is this the best acronym in science? It’s certainly the smelliest

Tom Gauld on mice and men

Twisteddoodles on a scientific romance