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Shallow earthquakes near active volcanoes during the past 48 hours (update 10:51, Sunday, 21 Jun 2020) – VolcanoDiscovery

Map of earthquakes near active volcanoes

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Coffee stains inspire new printing technique – Mirage News

Have you ever spilled your coffee on your desk? You may then have observed one of the most puzzling phenomena of fluid mechanics – the coffee-ring…

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Have you ever spilled your coffee on your desk? You may then have observed one of the most puzzling phenomena of fluid mechanics – the coffee-ring effect.
Coffee rings form because the liquid evaporates quicker at the edges, causing an accumulation of solid particles that results in the characteristic dark ring.
Inks behave like coffee – particles in the ink accumulate around the edges creating irregular shapes and uneven surfaces, especially when printing on hard surfaces like silicon wafers …

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Coronavirus-hit Melbourne supermarket alarmed by silence from contact tracers – ABC News

The owner of a Melbourne supermarket says she finds it “disturbing” she still has not heard from contact tracers a fortnight after one of her staff tested positive for COVID-19.

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When supermarket owner Tina Reddrop learned the partner of a staff member had COVID-19, she took no chances.
Key points:

  • A staff member at Supa IGA Werribee tested positive to COVID-19
  • Store owner Tina Reddrop is surprised she has still not heard from contact tracers two weeks later
  • No other staff at the store have tested positive

“We asked her to immediately get tested,” Ms Reddrop said.
“Members of staff who were in contact with her were also asked to self…

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Perseid Meteor Shower: watch and follow live online – AS English

Follow the Perseid meteor shower live online. with another great chance tonight to see the Tears of San Lorenzo as they once again streak the heavens.

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Watch out for the moon and let your eyes adjust
The moon will be a slight nuisance for watching the meteors tonight, but it shouldn’t ruin the display. If you can, just get a barn or rocks or a mountain between you and the moon so its light doesn’t get into eyes.
Remember your eyes need up to 20 minutes to truly adjust to the dark, so give yourself time. The meteors often come in bursts too, so don’t give up if you’ve seen nothing after five minutes. They will come!
Also, don’t be tempted to …

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