Why are rubber-like blocks washing up on beaches? For the past few years, 100-year-old rubber-like blocks from Indonesia have been mysteriously washing up on beaches in the UK and northern Europe. The Titanic has been suggested as one of the possible sources - but now a beachcomber says she may have solved the puzzle of the Tjipetir blocks.
New Zealand artist Peter Donnelly's art hangs in no galleries. His medium is sand, and each work lasts only as long as the incoming tide.
Dr Beachcombing is curious about the strange and the unexpected in records of the past. This is his engaging blog.
"When I get the time when I'm not raking, whenever I'm near water, I'll beach comb for bits of wood, feather or anything else that appeals and make some boats."