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2H6020J Few pedestrians on the rather busy street in metaverse conceptual reality

Is there evidence disproving the notion we are part of a simulation?

Our readers are largely agreed on this one: no, there鈥檚 no evidence - but even so, Occam鈥檚 razor would suggest it is unlikely

How do we know that gravity has the same speed as light?

CY810A Senior / mature man (aged 71) humorous portrait with prominent bushy wild unkempt eyebrows

This week鈥檚 new questions

2T7WK87 Hooper, Colorado, USA - July 21, 2023: An alien welcomes visitors to the UFO Watchtower, a unique roadside attraction in the San Luis Valley.

Could an advanced civilisation develop without the wheel?

HUD Matrix particles grid. Virtual reality. Grid core. Magic explosion star with particles. Acceleration race. Glow lines. Colorful flash. Big bang. Light trails. Glitch effect. Deep space.; Shutterstock ID 1590869041; purchase_order: -; job: -; client: -; other: -

Did abstract mathematics exist before the big bang? Part 2

Group of Asian friends having fun enjoying beach camping in summer

This week鈥檚 new questions

A radar-equipped speed camera monitors the traffic on a road, flashing a yellow light when it catches a car exceeding the speed limit, and using technology to identify the vehicle and enforce the law.; Shutterstock ID 2392738707; purchase_order: -; job: -; client: -; other: -

How fast am I moving and in which direction?

Volcano Karymsky explosion on Kamchatka; Shutterstock ID 1990974674; purchase_order: -; job: -; client: -; other: -

This week鈥檚 new questions

Food tin cans. Groceries background with dof.; Shutterstock ID 169474457; purchase_order: -; job: -; client: -; other: -

In a post-apocalyptic world, how long would canned food remain edible?

This is a 3D illustration of Three Merging Supermassive Black Holes.

Do black holes look the same from any angle?

Our readers get to grips with the various parts of a black hole to answer this one, from accretion discs to singularities

This week鈥檚 new questions

Why does the return journey seem much shorter than the outward leg?

Can a trapped mouse really find its way back from a mile away?

This week鈥檚 new questions