Gum disease and Alzheimer's: Your questions answered
30 January 2019
People are questioning a landmark study suggesting that a bacterium involved in gum disease may also cause Alzheimer's. Here's what you need to know about the study
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Premium
So long, veganuary: Here’s how to consume consciously year round
30 January 2019
Cutting out meat and dairy products is a great way to save the world from your dinner plate, but there are many more, says P. K. Newby
People are seeking sperm donors online, but are the risks worth it?
30 January 2019
Meeting your sperm donor offers a more personal experience, but the medical and legal complications might outweigh the benefits
Siberian cave reveals secrets of its mysterious Denisovan inhabitants
30 January 2019
Denisova cave in Siberia was home to an ancient group of humans – and now we get a glimpse of some of the beautiful artefacts they left behind
Feedback: Planting a flag in great Pacific plastic patch
30 January 2019
An island with endless sea views. Plus: a tiny piece of ant, a stone circle that isn't what it seems, why sex won't put you off your game, and more
Monarch butterflies' beautiful wing scales enable their epic migration
30 January 2019
This extreme close-up of a butterfly wing, made by stitching together 2100 exposures, shows the tiny scales that allow monarchs to fly thousands of kilometres
Some snails wear jackets made of algae to protect them from the sun
30 January 2019
Turban snails have a special trick for coping with dramatic changes of temperature caused by the tides – they wear heatproof jackets made from algae
Net effect
30 January 2019
What is the worst that could happen if the entire world's internet were to go down for a day? (Perhaps we could do this intentionally and make it an international holiday!)
Fobbed off (cont)
30 January 2019
When I use the electronic key fob to lock or unlock my car, no other car parked nearby has its locks activated. This is as it should be, but how does the system work?
Town or country?
30 January 2019
Which lifestyle is better for my health: breathing plenty of fresh air in a dull, rural village, or never being short of mental stimulation by opting for life in a suburban metropolis with its polluted air?
