The brightest take on this week’s science

You might think radiologists or nuclear medicine physicists would face the greatest dangers of radiation exposure.

But the science suggests otherwise.

In fact, the jobs that appear to carry the worst risks are nowhere near nuclear infrastructure or hospitals.

They’re literally miles above it, cruising through the skies.

Read more.

There's a lot of excitement about hydrogen fuel as a sustainable energy solution.

While its current reliance on fossil fuels is a problem, another great challenge facing the hydrogen economy is lesser-known: its infrastructure.

New research suggests the gas turbines we currently use won't cope with hydrogen as a fuel source.

Looks like we’re going to need all new alloys.

Read more.

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A) Velcro
B) Gecko foot
C) Spirochetes
D) Rubber band

Answer at the bottom.

At the heart of the Milky Way, there lurks a supermassive black hole named Sagittarius A*.

It’s relatively small as supermassive black holes go, but the gravitational regime in its immediate vicinity provokes some wild behavior in the stars that inhabit it.

Now astronomers have discovered a star that leaves the rest in the dust.

Just like a rollercoaster, it's not just the top speed that makes this star’s journey interesting.

It's what happens along the way.

Read more.

The human retina is the only place in the body where blood vessels and nerve tissues can be seen without invasive procedures.

That’s why scientists are turning to eye scans to explore early warning signs of hidden diseases, like Alzheimer’s.

Nothing like a sip of science!

Microscope answer: Gecko foot

The grippy foot of a gecko doesn’t rely on a glue-like substance. Geckos can climb vertical surfaces because of millions of tiny hairs – each with a tip that looks like a spatula. A typical mature gecko could support a weight of 133 kilograms (293 pounds) with just its foot hairs.