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Beats me

19 September 2018

When I was standing on the scales in my surgery today (I am a doctor), I noticed that the needle moved very slightly, exactly in time with my heartbeat. What could account for this fluctuation?

Time Difference

19 September 2018

If we ever colonised a planet with a greater diurnal period, say 30 hours, how long would it take the circadian systems of humans and other species to adapt?

Out cold

19 September 2018

I read recently that turtles were being "cold-stunned" and sharks were freezing to death in the ocean off the north-eastern US coast. This was due to a cold spell with air temperatures of -12°C, rather than the average 1°C. Is this particularly cold...

Taking a bow

19 September 2018

Recent strange weather conditions have led to a number of extraordinarily bright local rainbows. They contain extra colours inside the usual violet. There are as many as three additional bands: a narrow one of orange-yellow, a wider one the vivid green...

Dramatic pictures of the storm damage from Florence and Mangkhut

19 September 2018

Extreme storms Hurricane Florence and Typhoon Mangkhut have caused destruction and taken lives across the globe this week, forcing millions to evacuate their homes

Feedback: Elf and safety officer tackles Germany's troll roads

19 September 2018

Plus: the Hollywood star selling water with transformed DNA, mythical monster joins the military, glowing rocks in the US, pink lakes in Russia, and more