Why (some) cicadas only come out once every 17 years

Periodical cicadas spend 99.5% of their life underground.

Most of them live in large broods that go underground for cycles of 17 or 13 years — though some have different timings.

During these periods, they live as nymphs that feed on fluids from the roots of trees.

When the time is right, the individuals in a brood emerge, all at once, and live overground for only a few weeks.

Cicadas likely developed this evolutionary strategy to avoid predators. Using prime numbers for their emergence makes it difficult for predators to adapt.

T. Rex wasn’t that smart. Its intelligence was more on par with a large crocodile

Not too long ago, Brazilian neuroscientist Suzana Herculano-Houzel published a controversial study that boldly claimed that T. rex had an intellect rivaling modern baboons. The assumption was that Tyrannosaurus rex was very smart and might have even used tools (with those tiny hands?). It might have passed down knowledge to offspring through cultural transmission, this study said. All of this naturally attracted a lot of media attention. Suddenly, the king of the dinosaurs was not only physically menacing but also ultrasmart (for a reptile) — that’s double the trouble. However, a new study out...

AI is starting to make coffee — and it’s really good at it

Finns love their coffee. Per capita, people in Finland consume 12kgs of coffee per year, making them the second largest per-capita coffee drinkers, only surpassed by Luxembourg.

Finland also often ranks as the most technologically advanced country in the world.

So, it only makes sense that they embrace a merger of the two — technology, and coffee.

Thus, an artisanal coffee shop in Helsinki, Finland, made news when they started selling an AI-formulated blend.

The human egg locks like Fort Knox after it’s fertilized. Scientists finally find out how

During a single ejaculation, millions of sperm embark on their arduous journey to the egg.

On the way, numerous challenges await. These include an acidic environment in the vagina, the cervix’s mucus which can act as a barrier or filter, the many wrong turns within the uterus, and the final challenge of penetrating the egg itself which is encased in a protective layer called the zona pellucida.

Only a few hundred lucky sperm actually make it close to the egg. But, in the end, there is only one winner.

Cities are vulnerable to heatwaves. But green spaces can help more than we thought

It’s not just that the planet is getting hotter; cities are getting much hotter than their surroundings. In fact, urban heatwaves have become a common occurrence, affecting 1.7 billion people. In Europe alone, the 2023 heatwave killed over 61,000 people. Now, a new study by researchers in the U.K. shows how much green interventions can help cool down cities. The world is heating up as a result of our activity — by now, hopefully, we all know that. But fewer people know that cities are heat islands. The Urban Heat Island is a phenomenon where urban and suburban areas experien...

Scientists make most precise measurements of antimatter -- but only deepen mystery

Credit: The Reality Files. Antimatter is, you've guessed it, the opposite of matter. When the two meet, they annihilate each other. According to the Big Bang theory, at the ‘T zero', equal amounts of matter and antimatter were created in the early universe.

Birds might be able to see magnetic fields, thanks to special proteins in their retinas

Birds have a built-in magnetic sensor to help them find their home and migrate safely - all thanks to proteins in their eyes. Image credits Popular Science Monthly Volume 83 via Wikimedia. Common wisdom holds that iron-rich cells in birds' beaks act as microscopic compasses to help them navigate.

Scientists reprogram brain cells that store memories about places

Credit: Pixabay. Without long-term memory, none of us would be functional human beings. In order to make sense of the world, our memory employs all sorts of reference points, anchors if you will. For instance, one very important building block is the memory of places.

Almost 40% of at-home DNA tests are inaccurate, scientists warn

A new study has found that at-home DNA testing kits are wrong 40% of the time. Via Pixabay/geralt For those who haven't heard of them, direct-to-consumer genetic tests are genetic tests available that offer information about one's ancestors, risks of certain diseases, and other traits, such as eye color. The demand for this kind of genetic…

Marijuana is nowhere near as dangerous to the brain as alcohol

Credit: Pixabay. Because of the powerful psychoactive effect of marijuana, many have always assumed that prolonged use can hurt the brain in a similar way to alcohol but while the effects of alcohol on the human brain have been thoroughly documented, the same can't be said about marijuana.

US court deems disobedience a 'necessity' against climate change, environmental threats

When politics damage climate, civil disobedience should be allowed to save the day, Massachusetts court rules.

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Elon Musk publishes new academic paper detailing his plans to colonize Mars

SpaceX's founder and CEO published an academic paper earlier this month outlining his vision for a future where the Red Planet is permanently inhabited. Illustration of Musk's vision for a Mars colony.

More than a third of graduate students are depressed

A new study found that graduate students are six times more likely to exhibit depression symptoms than the general population. The findings should surprise no one but it's important to have quantitative data about a mental health hazard running rampant in universities across the entire world.

Evidence of early innovation pushes back human evolutionary timeline

An international team of researchers found that 320,000 years ago humans already developed impressive social structures and technological innovations such as using color pigments and manufacturing more sophisticated tools. The first evidence of human life in the Olorgesailie Basin comes from about 1.2 million years ago. For hundreds of the thousands of years, people living there…

Walmart silently filed a patent for robotic bees meant to pollinate crops

Walmart is making moves on the bee's share of agriculture - the company recently filed a patent for autonomous, robotic bees. "I can't beelieve you're after my job too!" Image credits USGS Bee Inventory and Monitoring Lab / Flickr.