This week's new questions
1 May 2019
Which is better for the environment: using a heated hand dryer for 30 seconds, or using two disposable paper hand towels?
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Premium
This week's new questions
1 May 2019
Why do some animals have patterns of hair colours such as stripes or spots, and why can't I have stripy hair?
Canine connection
1 May 2019
While quietly walking my small dog, we often pass houses where the dog inside, which is out of sight, begins barking. How does the dog know to bark if it can't see, smell or hear us?
Bring me sunshine
1 May 2019
Can a blind person still benefit from the positive effects of natural light on circadian rhythms and mental well-being? I lost my remaining light perception 10 years ago and since that time I've had insomnia. This would suggest that the answer to my...
