The brightest take on this week’s science

Astronomers have an ear to space. They are listening for signs that we are not alone.

Now, for the first time, astronomers have detected radio signals coming directly from an exoplanet.

But it’s not an alien life form trying to get in touch.

Astronomers have zoomed in and found where the broadcasts are coming from.

They are emanating from auroras around Beta Pictoris b, which orbits a star around 63.4 light-years away.

This exoplanet is huge, around 10 times the mass of Jupiter.

It’s also the first exoplanet that we’ve heard a clear radio signal from.

Read more.

A federation known as the 'global voice of dementia' has published a new report that argues Alzheimer’s disease is no longer universally untreatable.

Instead, it is increasingly viewed as a condition that can be diagnosed early, with symptoms that may be alleviated or even possibly delayed.

Over the past decade, the number of possible dementia drugs under investigation has increased by around 40 percent.

This year alone, we should get results from eight phase III trials.

"For now, there is no single breakthrough to rival the discovery of penicillin or the advent of statins," argues the report.

"Instead, there is something quieter… It is a shift from cure to prevention, from molecule to lifestyle, from inevitability to possibility."

Read more.

A) Teardrop
B) Crab eyeball
C) Macrophage
D) Taste bud

Answer at the bottom.

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What you eat and how often you exercise may not be the best predictors for how long you will live.

Both of these factors can add years to a person’s life.

But another component of health could be even more important to longevity, according to recent research:

Analyzing county-level survey data from across the US, researchers found that under seven hours of sleep was strongly correlated to lower life expectancy.

"I'm a sleep physiologist who understands the health benefits of sleep, but the strength of the association between sleep sufficiency and life expectancy was remarkable to me," said sleep physiologist Andrew McHill.

Read more.

The ribbon worm (Lineus sanguineus) might not look like much, but this wriggler has an incredible superpower.

It can regrow its own head and brain from just a tiny sliver of tissue.

On a human scale, that power could turn just 0.3 grams (0.01 ounces) of tissue into a 68-kilogram (150-pound) individual.

Check out these tiny crustaceans, which scientists found riding giant sea spiders like chariots, thousands of meters below the Southeast Pacific Ocean.

Microscope answer: Macrophage.

This is a microscopic image of a macrophage – one of the first immune cells to arrive at the scene of an infection. They patrol your tissues, engulfing invaders and debris.