91色情片

Man looks to a huge brain. Mental capacity, cognitive processing, and human interaction. This is a 3d render illustration; Shutterstock ID 2341475275; purchase_order: -; job: -; client: -; other: -

Would your brain run out of storage space if you could live forever?

No, say our readers, because that isn鈥檛 how your brain works: memories are constantly being deleted to make way for new ones

FY9W05 International Space Station and astronaut in outer space over the planet Earth. Elements of this image furnished by NASA.

This week鈥檚 new questions

Hot news: abandoned bird’s nest ‘still there’, reports professor

Tom Gauld on not disturbing the professor while he’s thinking

Twisteddoodles takes on virtual AI assistants

A red giant star and white dwarf orbit each other in this animation of a nova similar to T Coronae Borealis. The red giant is a large sphere in shades of red, orange, and white, with the side facing the white dwarf the lightest shades. The white dwarf is hidden in a bright glow of white and yellows, which represent an accretion disk around the star. A stream of material, shown as a diffuse cloud of red, flows from the red giant to the white dwarf. When the red giant moves behind the white dwarf, a nova explosion on the white dwarf ignites, creating a ball of ejected nova material shown in pale orange. After the fog of material clears, a small white spot remains, indicating that the white dwarf has survived the explosion. NASA/Goddard Space Flight Center

Space

Get ready to watch a rare explosive star system blaze into life

Close up of an augmented reality (AR) sand table, an advanced technology to create a learning tool for students.; Shutterstock ID 1857112591; purchase_order: -; job: -; client: -; other: -

As average sea levels rise, will map heights need to be recalculated?

cute two cats on a balcony railing; Shutterstock ID 1662554986; purchase_order: -; job: -; client: -; other: -

Are humans the only animal to experience vertigo?

2BE3Y6H Bedding and sheets are freshly laundered and are hanging out to dry on a washing line in residential back garden.

Why does a duvet bag up all the other items in the washing machine?

Builder or carpenter working on the roof - silhouette with strong back light; Shutterstock ID 84416038; purchase_order: -; job: -; client: -; other: -

This week鈥檚 new questions

What happens when a hammer hits a nail? Do hammer electrons hit nail electrons? If not, what drives the nail in? Oliver Howes, Sydney, Australia

Hardening 鈥� the new way to stop your kids getting a cold?

Technology

See the solitary structures that once helped aircraft stay on course

Tom Gauld: Science Cat

Twisteddoodles on research band name ideas