Fun fact: trilobites were able to see thanks to eyes made of calcite instead of soft tissue. YouTuber Thunderf00t shows off a cool fossil and explains the phenomenon.
Interestingly though the trilobites eyes were made of stone, calcite to be exact, so there are many examples of fossilised trilobite eyes. You can get a trilobite fossil with amazing eye detail on ebay for about 50USD. From looking around, the trilobites from Morocco seemed the best to me. It was long thought that the calcite eye disappeared with the trilobites until it was recently discovered that brittle stars have many calcite 'eyes' all over their exoskeleton. Although it should be said theses 'eyes' are tiny!
Los Angeles County's Natural History Museum recently posted an interesting piece on how brittle stars "see" things.
• Trilobites: the creature that looked on the world through STONE eyes! (YouTube / Thunderf00t)
One of the major contributors to greenhouse gases is the methane that cows belch up as they break down cellulose, but five years ago, research from Australia's Commonwealth Scientific and Industrial Research Organisation (CSIRO) found that adding small amounts of a pink seaweed called Asparagopsis to cows' diets eliminated the gut microbes responsible for methane […]
On Slate Star Codex (previously), Scott Alexander breaks down Invisible Designers: Brain Evolution Through the Lens of Parasite Manipulation, Marco Del Giudice's Quarterly Review of Biology paper that examines the measures that parasites take to influence their hosts' behaviors, and the countermeasures that hosts evolve to combat them.
NASA announced today that the agency is moving ahead with a planned mission to Jupiter’s moon Europa. In this next phase, engineers will complete the final design, construction, and testing of the Europa Clipper spacecraft for a launch as soon as 2023. Why the icy moon Europa? From NASA: NASA’s Europa Clipper mission will conduct […]
If you’re marketing on the web, your Google-fu needs to be strong – and up to date. Without a firm grasp on what drives traffic, you’ll never be able to take the wheel. That’s why even if you know where to put your keywords, a little extra effort goes a long way on any marketer’s […]
Want to keep the dentist away? A little tooth care at morning and night isn’t bad, but it won’t keep the stains from smoking or fried foods at bay for long. If you enjoy your food and want to avoid the consequences, an upgrade from that old analog toothbrush can make a huge difference. Among […]
If your office works at all, it uses Microsoft Office. Those icons for Word, PowerPoint, and Outlook are as familiar around some workplaces as the coffee machine. So familiar, in fact, that they get taken for granted – and rarely used to their full potential. Whether you need a crash course in the essential tools […]