ROSEMARY NORTON, VIA EMAIL
WHAT SHOULD I DO IF I GET STRANDED ON SNAKE ISLAND?
YOUR QUESTIONS ANSWERED
DR HELEN PILCHER Biology
PETE LAWRENCE Astronomy
DR CHRISTIAN JARRETT Psychology
DR ALASTAIR GUNN Astrophysics
DR CLAIRE ASHER Nature
DR NISH MANEK Health and medicine
DR EMMA DAVIES Food and chemistry
CERI PERKINS Environment
LUIS VILLAZON Engineering and tech
Just off the coast of southern Brazil lies the island of Queimada Grande, known as ‘Snake Island’. Covering just 43 hectares (106 acres), this rocky island is home to between 2,000 and 4,000 highly venomous golden lancehead vipers (Bothrops insularis), which can grow to 70cm (just over 2ft). The snakes were trapped there around 11,000 years ago, at the end of the last ice age, when rising sea levels cut them off from the mainland.