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Ancient Maya civilization used advanced water treatment technology
The oldest known example of a water treatment system in the Western Hemisphere was recently discovered in Guatemala.
January 7, 2021
The sky in 2020
A collection of astronomical photos of 2020 from southern British Columbia, Canada. The music is 'Windswept' by Kevin Macleod.
December 31, 2020
Sun’s entry into zodiac signs, 2021
Every year, at the December solstice, the sun enters the sign Capricorn. One month later, on January 19, 2021, the sun will enter the sign Aquarius. Look here for the dates for the sun's entry into each sign of the zodiac for the year 2021.
December 28, 2020
New strain of Covid-19 explained
A new strain of the virus that causes Covid-19 appears to be spreading fast in the the UK. Why it matters that the coronavirus is changing, and what it means for vaccine effectiveness.
December 22, 2020
What are your chances of a white Christmas this year?
Dreaming of a white Christmas? Here's a map depicting which places in the US have the best chance of being snowy on Christmas Day 2020.
December 16, 2020
Is that a UFO?! There’s probably an explanation
Most Unidentified Flying Objects aren't actually unidentified. Here's a list of phenomena, either natural or human-made, that people often mistake for UFOs.
December 15, 2020
Less air pollution during Covid-19 restrictions, says study
NASA researchers have found that since February, pandemic restrictions have reduced global nitrogen dioxide concentrations by nearly 20%.
December 4, 2020
Video shows Arecibo telescope crash
New video shows Arecibo's receiver platform breaking loose and falling onto the radio telescope dish 400 feet below. No one was injured.
December 3, 2020
To reduce chances of spreading coronavirus, keep indoor air clean
Being indoors with other people is a recipe for spreading the coronavirus. But removing airborne particles through proper ventilation and air filtration can reduce some of that risk.
November 25, 2020
Epidemiologist explains CDC guidance on 15 minutes of exposure
New guidance from the CDC says that 15 minutes of exposure – regardless of whether that occurs at one time – can result in transmission of the coronavirus.
November 24, 2020
