51动漫

This week鈥檚 new questions

Why do seals have such cute faces? When we breathe, the dominant nasal passage seems to swap sides. What causes this and why does it happen?

2B5DJY0 Row of homemade jars of jam for sale on the market counter.

What is the optimal amount of water to clean a glass jar?

A 3D illustration of the now debunked competing conspiracy theory that the Earth is flat, as it appears from land, rather than spherical. Earth texture maps courtesy of NASA.gov; Shutterstock ID 1240127368; purchase_order: -; job: -; client: -; other:

What would the horizon and landscape look like on a disc-shaped world?

2GYH6HN Irkutsk, Russia - July 28, 2021 Barber shop street advertisement, mannequin head with bushy beard

This week鈥檚 new questions

2HR09CM Killer whale, Orcinus orca, spy hop, Vestfjord, Ofotfjord, and Tysfjord, Lofoten Islands, Norway, Atlantic Ocean

Why don鈥檛 orcas attack humans?

Photograph of street sign spelling error 'Stop hhre' in Hollywood-Silverlake area. 'No (e)ras(e)r? -- Som(e) on(e) forgot som(e)thing wh(e)n th(e) Traffic (E)ngin(ee)ring D(e)partm(e)nt's sign-paint(e)rs post(e)d this warning at T(e)mple Str(ee)t and Virgil. Whit(e) l(e)tt(e)rs four f(ee)t high 'adv(e)rtis(e)' sp(e)lling (e)rror!' -- Examiner clipping attached to verso, dated 27 December 1949.;Streetscape. Camera direction: 214 degrees from due north. Horizontal photography.Temple Street & Virgil Avenue; Silver Lake; Hollywood; Los Angeles, CaliforniaTraffic Engineering Department;Los Angeles -- City -- Streets -- Signs & Repair. (Photo by Los Angeles Examiner/USC Libraries/Corbis via Getty Images)

Why don鈥檛 people own up to their mistakes?

INDIA. Bangalore. 2016. Laughing Yoga workshop participant Rie Sakamoto

Why do we throw our heads back when experiencing emotions? part 2

EH7TAT Clock faces, illustration

This week鈥檚 new questions

INDIA. Bangalore. 2016. Laughing Yoga workshop participant Rie Sakamoto

Why do we throw our heads back when experiencing different emotions?

Close-up of a Cymbiola nobilis shell, also known as the noble volute, against a black background, featuring its distinctive zigzag patterns and smooth texture; Shutterstock ID 2637416271; purchase_order: -; job: -; client: -; other:

How do sea molluscs create the consistent patterns on their shells?

Patterns on a shell are produced similarly to a tiger鈥檚 stripes and a leopard鈥檚 spots, explains one reader

If Earth exploded, how many rocks would have evidence of life? part 2

Why do we use pillows? part 3

This week鈥檚 new questions

Is it more efficient to dry towels hung up portrait or landscape?