Visitors from outer space or a natural phenomena? Surfers and early morning walkers were stunned to find thousands of 'alien eggs' on a Sydney beach this weekend.
Locals in Dee Why, on the city's North Shore, reported seeing a large number of the strange objects which had washed ashore overnight.
But rather than the green spheres being something from another planet, scientists explained they were a type of sponge-like seaweed that forms egg shapes possibly to protect themselves from predators.
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