The 'Blue Marble': One of Earth's most iconic images, 50 years on

NASA's most requested photo, the ‘Blue Marble', turns 50

Marble Cake Recipe This marble cake is a delightful treat that combines the rich flavors of vanilla and chocolate in a beautifully layered design. Ingredients: 150 g soft butter 150 g sugar 3 eggs (size M) 1 tsp vanilla extract 200 g flour 2 tsp baking powder 1 pinch of salt 100 ml milk 2 tbsp cocoa powder 2 tbsp milk (for the chocolate batter) 50 g dark chocolate, melted Instructions: Preheat the oven to 180°C (top and bottom heat). Grease a 19 cm diameter cake pan and dust with flour, or line