Popular Science. Demystifying the worlds of science and technology since 1872.

Your eyes can reveal the accuracy of your memories
New research suggests your pupils may reflect how clearly you remember something.

Literal time ladies used to sell people a look at their watches
The Greenwich Time Lady, plus other weird things we learned this week.

Rachel Feltman
At Popular Science, we report and write dozens of stories every week. And while a lot of the fun facts we stumble across make it into our articles, there are lots of other weird facts that we just keep around the office. So we figured, why not share those with you? Welcome to The Weirdest Thing I Learned This Week.

Medieval ‘testicle dagger’ lives up to its name
Archeologists found the weapon in one of Sweden’s most famous castles.

31 million tons of seaweed ready to stink up Florida’s beaches
When rotting on the beach, Sargassum smells like rotten eggs.

Humpback whales can give birth while migrating thousands of miles
Hundreds of calves have been born outside known breeding grounds near Australia.

The US test-fired its most powerful laser ever
ZEUS produced 100 times Earth’s electricity output in just 25 quintillionths of a second.

Fisherman discovers century-old Great Lakes shipwreck
Finding long lost vessels also runs in the family, apparently.

Ducati adds 50 tiny sensors to motorbikes to amp up its racing game
The company teamed up with Lenovo to collect and parse information to tweak performance.

How to customize controls and gestures on Apple AirPods
You can tailor your AirPods to suit your own preferences.

Embrace the fun of growing culinary plants in unexpected places
Edible plants are breaking out of the bed—and thriving in wild new places.
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