The fossils that rewrite the history of the dinosaurs: 230 million-year-old remains suggest their rise was 'more gradual' than thought
化石重写恐龙历史:2.3亿年前恐龙遗骸表明,恐龙崛起的过程比想象中更为平缓。
Sarah Griffiths for MailOnline
Jay
Our own self importance as the apex predator & only sentient being on this planet really is quite depressing. We'll likely be here for the blink of an eye; & it will take far far more than an epiphany to change it.Matey
Whenever I see a story on dinosaurs I always think of John Cleese as Mizz Anne Elk delivering her theory on dinosaurs being thin at one end, fat in the middle and thin at the other end. It's her theory and all hers !UsOcoms1
Some say if you break down the life span of earth so far into a 24 hour day, humans would appear at 11:59 and 59 seconds PM.Tuna SandwichReply toRitzBiscuit
Oh look - a halfwit. Let's point and laugh. Over the course of those 25 years, Richard Lenski has bred 50k generations of 12 E.Coli populations, whose environments were manipulated to impose selective pressure. Between generations 30k and 35k, one of the populations evolved the ability to absorb, ingest and metabolise citrate, making it easier for them to survive. E.Coli's inability to ingest citrate is one of the main distinctions from its close cousin Salmonella. This ability to digest citrate came from a potentiating mutation, which required at least two mutations prior to activation - meaning it did not exist in the previous generation, or in any of the first twenty thousand. Earlier generations of the E.Coli were frozen, and the genes were not found. So a series of mutations allowed an organism to gain a new function - macro evolution observed. Let's hope this Usutu1973 buffoon is sterile.sskiles
There is still a lot for us to learn about the past. What we believed were the precursors to humans have now been discovered to be living on Earth at the same time as us, and what we believed were the precursors to dinosaurs have now been discovered to be living on Earth at the same time as dinosaurs. Interesting to think what we will learn in the next couple hundred years.