Read the following sentences. The second and fifth sentences are fixed and are numbered 2 and 5 respectively. The remaining are labeled P, Q, R,S and T. Rearrange these five sentences to form a meaningful paragraph and choose the proper sequence from the given options. 

P. Research demonstrates that the fossil is over one million years old, eclipsing the previous record of hippo in the UK by at least 300,000 years and filling an important gap in the British fossil record. 

2. In a new study published in the Journal of Quaternary Science and co-authored with researchers from Royal Holloway, University of London, the tooth is identified as belonging to an extinct species of hippo called Hippopotamus antiquus, which ranged across Europe in warm periods during the Ice Age. 

Q. Excavations at Westbury Cave in Somerset, led by University of Leicester PhD student Neil Adams, uncovered a million-year-old hippo tooth which shows the animal roamed Britain much earlier than previously thought. 

R. Professor Danielle Schreve, co-author of the study, said that Hippos are not only fabulous animals to find but they also reveal evidence about past climates. 

5. Scientists know remarkably little about the fauna, flora and environments in Britain between about 1.8 and 0.8 million years ago, a key period when early humans were beginning to occupy Europe.

S. It was much larger than the modern African hippo, weighing around 3 tonnes, and was even more reliant on aquatic habitats than its living relative. 

T. But new research at Westbury Cave is helping to fill in this gap and it shows that during this interval there were periods warm and wet enough to allow hippos to migrate all the way from the Mediterranean to southern England.