Meiolania
Prehistoric totoises that survived into the Holocene from the Oligocene- becoming extinct only around 2,000 years ago! They were around 8.2 feet in length.
Wow Wednesday - Wasps that are smaller than amoebas
Thrips are tiny insects, typically just a millimetre in length. Some are barely half that size. If that’s how big the adults are, imagine how small a thrips’ egg must be. Now, consider that there are insects that lay their eggs inside the egg of a thrips.
That’s one of them in the image above – the wasp, Megaphragma mymaripenne. It’s pictured next to a Paramecium and an amoeba at the same scale. Even though both these creatures are made up of a single cell, the wasp – complete with eyes, brain, wings, muscles, guts and genitals – is actuallysmaller. At just 200 micrometres (a fifth of a millimetre), this wasp is the third smallest insect alive and a miracle of miniaturisation.
Polilov found that M.mymaripenne has one of the smallest nervous systems of any insect, consisting of just 7,400 neurons. For comparison, the common housefly has 340,000 and the honeybee has 850,000. And yet, with a hundred times fewer neurons, the wasp can fly, search for food, and find the right places to lay its eggs.
Click through to read more about this ridiculously awesome animal.
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