Sharks first evolved almost 200 million years before the dinosaurs and we’re still learning more about species past and present. Emma Bernard, Curator of Fossil Fish, joined Alistair Hendry to show off some of the Museum’s shark specimens, and to answer your questions. Find out just how huge a Megalodon tooth is, discover strange shark species and see some incredible fossil specimens including one where cartilaginous soft tissue has been preserved.
by Chris Hughes, Earth Sciences, Natural History Museum
Every year in early May the Museum participates in the Fossil Festival at Lyme Regis, on the Jurassic Coast in Dorset. It’s an event involving thousands of members of the public with an interest in the ancient marine fossils found in the rocks along the coast near Lyme. Museum scientists occupy a large marquee on the sea front and engage in a whole range of outreach activities. The idea is to enable everybody to meet scientists, to talk about real fossils and enjoy exploring the geology and natural history of this area.
We headed down to Lyme Regis on the Tuesday before the Fossil Festival commenced. This allowed us a day to carry out some fieldwork in this world famous fossil locality before we led an outreach event at the Thomas Hardye School, in Dorset. On our field visit we had a look at some of the great fossil sites that are found all around Lyme. We decided to head out west toward the famous ammonite pavement at Monmouth beach. This was my first time in Lyme Regis and I was very excited because I had been told that these rocks were some of the best in the world for these fossils.
At the start of a major new project involving collaboration between 8 institutions from across the UK, Rachel Norman of the Museum’s Economic and Environmental Earth Sciences division introduces us to one of the new ways the CoG3 team are unearthing cobalt, a metal of great strategic and economic importance.
On Wednesday 27 January, Museum and University of Southampton scientists searched in the Museum collections for manganese nodules.
Manganese nodules form in very deep water on the seafloor, at the sediment-water interface, and cover vast areas. They form by the precipitation of manganese minerals out of seawater over extremely long time scales. Manganese nodules grow at a rate of just ~2 mm per million years, making them one of the slowest geological processes that we know of. This means that if a nodule reaches a radius of 50 mm, it could be 25 million years old!
You may have seen the Museum’s work in the news recently, when our scan of a catshark helped University of Sheffield researchers understand how shark teeth evolved. In this blog, Brett Clark from the Museum’s Vertebrates Palaeobiology department shows us the method used.
Our research, led by Dr Zerina Johanson, investigates the evolution and development of teeth in jawed vertebrates – in particular, the tooth arrangement of present day sharks.
But how exactly do you scan a shark?