The unpublished works of Charles Darwin – Evolution Disruptors
Yes, you’ve probably heard of Endocrine Disruptors, but have you heard of Evolution Disruptors? Here’s my definition:
Evolution disruptors are man-made or naturally occurring objects that, at certain levels of exposure, can interfere with the natural selection genetic process and alter the future evolutionary path in animals. It can result in adverse developmental, reproductive, neurological, and genetic mutations in both humans and wildlife. A wide range of objects, both natural and man-made, are thought to cause evolution disruption, including the selfie stick.
Can you think of another examples?
…and this one is a veggie-saurus, enjoying tomatoes
And yes, supersaurus actually did exist. Discovered in America in 1972, he was aptly named supersaurus (pronounced SOUP-er-SORE-us … see, there is a soup connection after all), because of its whopping length – about 30 m (110 feet) long.
Dave the Dot to Dot Dinosaur is back and still trying to figure out his new surroundings.
I’d forgotten how much I missed him, until I started to draw him again for this cartoon.
A coprolite is fossilised feces, with its derivation coming from the Greek words kopros (dung) and lithos (stone). For paleontologists they are significant, in that these trace fossils provide insight into the deceased owner’s diet.
I wonder how many budding palaeontologists sign up knowing that it’s not just bones that they will be playing with?
Dinosaur fossils (Latin fossus, meaning ‘having been dug up’) aren’t made of bone, they are made from rock (silica).
According to Wiki there are 6 ways of achieving this, but I’ll only describe the permineralization process. First, the dinosaur had to die and be covered up pretty much immediately (such as sinking in mud) before the scavengers found it. As time passes, more sediment covers the remains and the flesh starts to rot away, leaving only the bones which decay slower. As they decay, groundwater carrying rich minerals seep into where the bone once was. Effectively it is a mineral replacement process with the replacing of ‘bone’ mineral with ‘rock’ mineral. Once the bone has all been replaced you have a perfect replica of the original bone, but now made from rock.
Thanks to Murphy, our beautiful lady golden retriever, for modelling for this cartoon.
The month has nearly drawn to a close and we all know what that means – it must be time for another Friday freebie! Be sure to visits us in 3 days time to be one of the first to grab it.