91色情片

Close up photo of peony flower bud with water drops at sunlight after rain in garden. Natural floral background. Gardening, spring season, growth concept.; Shutterstock ID 1726658389; purchase_order: -; job: -; client: -; other:

How do plants know to bud when days get longer?

A protein accumulating in leaf tissue is the secret behind this plant superpower, explains one reader

Close-up of adorable young seal swimming in clear blue water and looking at camera, near Brighton, Sussex, United Kingdom

Why do seals have such cute faces? part 2

2WRG1EA close up of frozen green peas, top view of vegetable food, peas from freezer background

What鈥檚 the optimal ratio of frozen peas to cold tap water? Part 3

2BXTXNE Red giant star. Sun. Earth landscape. Moon. Venus. Solar system

This week鈥檚 new questions

2NRWW3F London Colour Walk at Old Spitalfields Market, London, UK

Why do people view colours as clashing or complementing each other?

Two scientists use a massive, illuminated periodic table of elements as they discuss the element holmium in the Lawrence Hall of Science at the University of California, Berkeley. (Photo by ?? Ted Streshinsky/CORBIS/Corbis via Getty Images)

How many elements in the periodic table could we safely remove? part 2

2WRG1EA close up of frozen green peas, top view of vegetable food, peas from freezer background

What鈥檚 the optimal ratio of frozen peas to cold tap water? Part 2

High five from a cute scruffy dog with a big smile! Cream wall background, shallow depth of field. Clever dog, the Bailey lightbox

Do left- and right-handedness exist in animals? part 3

E7MK5Y Insectivorous plant Venus fly trap (Dionaea muscipula) digesting a captured mosquito. Plant house, Galveston, Texas, USA.

This week鈥檚 new questions

What鈥檚 the optimal ratio of frozen peas to cold tap water?

You shouldn鈥檛 use any water, and perhaps consider cooking peas in the microwave, say our readers.

Why do humans feel the urge to share their thoughts with others?

Do left- and right-handedness exist in animals? part 2

How can gravity escape a black hole? part 2

This week鈥檚 new questions