A photo taken by NASA’s Mars Reconnaissance Orbiter appears to show spiders walking across the surface of Mars, but, in this case, things do not always look as they appear.

Which marvel of nature can build a 2 metre Orb Web with a silk that ranks as the World's toughest natural fibre? - The answer is the Darwin's Bark Spider and this real life "Spider Woman", no bigger than a thumbnail has baffled scientists with her web of steel.