We asked our readers to send in their best pictures on the theme of "fluids". Here is a selection of the photographs we received from around the world.
Richard Morasci: "In preparation for the Thanksgiving Day meal I was hosting, I started cleaning some tarnished silver candlestick holders in soapy water." [Richard Morasci]
Mairi Clare Dunlin: "A warming fluid for an autumn day." [Mairi Clare Dunlin]
Tony Cook: "During Covid I went out as often as possible with my camera, to help keep me sane. One morning after a downpour I spotted these tables outside a restaurant in Hereford. The sun was out and was being reflected from the restaurant window, highlighting the puddles on the tables." [Tony Cook]
Jane Luetkens: "On a very cold day, the frozen water was slowly becoming fluid again." [Jane Luetkens]
Keith Brooke: "A pebble defying the waves on Aldeburgh beach." [Keith Brooke]
Rajitha Cruz: "This picture was taken in Baselland, Switzerland. A worker’s cup of tea during a tea break." [Rajitha Cruz]
Elena Raikhlin: "I captured this image in Dutch Harbor, Alaska, on a calm, foggy September day. It reflects the interplay of mist, water and fog, fluids constantly shifting and blending into one another, transforming the scene. The ship serves as an anchor, a solid presence within the ever-changing flow of these elements." [Elena Raikhlin]
Adam Bullock: "Splash! The sea - being very fluid on Aberystwyth promenade. At high tide with a bit of wind, the waves often break over the prom. This was at 10am. By the high tide, at 10pm, Storm Ashley was in full swing and I couldn't have stood on this spot, even if I'd wanted to." [Adam Bullock]
Shane Barker: "Photographing a toy turtle falling into a vase of water took a great deal of trial and error. But the results showed what happens to the fluid when the turtle hits the water." [Shane Barker]
Peter Lassaline: "With the right combination of light, time and photographic gadgetry, one can capture the moment just after a water drop collides with the splash of a preceding water drop that fell into a cup of water." [Peter Lassaline]
Andrew Hilton: "The mixing effect resulting from coloured inks being dripped into a tank of water. Messy, but great fun." [Andrew Hilton]
Danny Hudson: "Olive oil and water droplets." [Danny Hudson]
Robert Wanerman: "A thermal pool in Iceland. If you look closely, you can see all three stages of matter: solid, liquid and gas." [Robert Wanerman]
Ian Refault: "Autumn leaves, taken in Greenwich Park, London, late afternoon, with great light on the pond as the sun went down." [Ian Refault]
Miran Norderland: "Following a brief summer rain, I was mesmerised by a perfectly positioned liquid sphere on a single leaf, mirroring my surroundings." [Miran Norderland]
Sai Revathi Singaraju: "When the sun sets, even a glass of wine becomes a canvas." [Sai Revathi Singaraju]
Rachael Blakey: "The fluids are a mixture of oil and water, and I captured the reflections of music notes through the water mixture. Location: New Brunswick, Canada." [Rachael Blakey]
Joan Murray: "Sunlight through my window cast a shadow of a bottle on my bookcase." [Joan Murray]
The next theme is "bright lights" and the deadline for entries is 17 December 2024.
The pictures will be published later that week and you will be able to find them, along with other galleries, on the In Pictures section of the BBC News website.
Prince Harry and Meghan Markle have a stunning home with their two children Prince Archie and Princess Lilibet, but there is uncertainty on the horizon for the Sussexes
A lawyer and researcher wrote on Reddit that a friend of a friend "started explaining my work to me, but in a completely wrong way and missed all of my points"
