A 300 metre-wide asteroid is making a close pass to the Earth.
Apophis - named after the Egyptian demon of destruction and darkness - has been put on a watch list by scientists.
They have calculated that in 2036 there is a very small chance it could collide with our planet.
However, its current fly-by is at a safe distance of about 14 million km - but this is close enough for astronomers to study the space rock and assess its future risk.
Apophis will not be visible with the naked eye, but space enthusiasts can watch it online via the Slooh space camera’s website.
Share prices on Egypt’s stock exchange have plunged almost 9.5 per cent, days after President Mohamed Morsi assumed sweeping powers that sparked clashes and polarised the country’s politics.
The main EGX-30 index shed 9.49 per cent by midday (10:00 GMT) on Sunday to reach 4,923.19 points, according to the Egyptian Exchange, with trading suspended for half an hour due to intense investor selling.
The bourse suspended trading for 30 minutes after intense selling by investors, as shares slumped in the first session since the president’s announcement.
But the slide continued as soon as share dealing resumed in the face of the deepening political crisis.
The drop comes as Egyptians have been deeply divided by Morsi’s move to forbid the judiciary from challenging his decisions until a new parliament is elected, with rival rallies sparking violence in several major cities.
The Muslim Brotherhood has called for nationwide protests on Sunday in support of Morsi’s decree, which has put him on a collision course with the judiciary and with many of the political forces that brought down Hosni Mubarak in a popular uprising in early 2011.
Climate change models may underestimate extinctions: Animals and plants could be on a collision course created by climate change
ScienceDaily (Jan. 3, 2012) — Predictions of the loss of animal and plant diversity around the world are common under models of future climate change. But a new study shows that because these climate models don’t account for species competition and movement, they could grossly underestimate future extinctions.