杏吧原创

BCM7JY Rainbow above rolling farmland on the edges of Dartmoor National Park Devon England Spring April 2009. Image shot 2009. Exact date unknown.

Why do rainbows refract light into many colours but not clouds? Part 2

There are a couple of different ways that cloud inversions can produce optical effects, explains one of our readers

2C0KN5C Funny husky dog in glasses lying on the grass in a summer park

Is short-sightedness found in other animals? Part 3

WMD74J Beautiful Flower Garden Flowers Perennial Annual Plants Colourful Bed Border Cottage Garden Flowerbed August Colorful Mixed Bed Mix Scene Breathtaking

This week鈥檚 new questions

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: -

Which animals can recognise individual people?

F73RH8 Old men sitting on bench, coorg, karnataka, india, asia

How can my brain predict if I鈥檒l recall a name or word?

3D illustration of A space station flies through the vastness of space. Spacecraft, spaceship design. High quality digital space sci-fi art in 5K - realistic visualization. Render; Shutterstock ID 2565680455; purchase_order: -; job: -; client: -; other: -

What would the surface of a neutron star look like? Part 2

Child's Spinning Top Toy; Shutterstock ID 365058569; purchase_order: -; job: -; client: -; other:

This week鈥檚 new questions

2M5GPCD Preparations of plants with bubble wrap for the winter

Should bubble wrap face the inside or the outside of the object?

BCM7JY Rainbow above rolling farmland on the edges of Dartmoor National Park Devon England Spring April 2009. Image shot 2009. Exact date unknown.

Why do rainbows refract light into several colours but clouds don鈥檛?

To warm up quickly, should I put on my trousers or top first? part 2

Our readers have found many approaches to answering this question, including one that borrows from a method used to assess burns.

This week鈥檚 new questions

If I walk through a聽spider鈥檚 web, what are its chances of survival?

Could a massive asteroid that hit Mars or the moon affect Earth?

Why do dogs bring back a stick if you throw it? Part 2