The fireball from space was spotted by a network of sky-watching cameras in Belgium, France, Luxembourg, the Netherlands and Germany.

The fireball from space was spotted by a network of sky-watching cameras in Belgium, France, Luxembourg, the Netherlands and Germany.

The fireball from space was spotted by a network of sky-watching cameras in Belgium, France, Luxembourg, the Netherlands and Germany.

The fireball from space was spotted by a network of sky-watching cameras in Belgium, France, Luxembourg, the Netherlands and Germany.

The fireball from space was spotted by a network of sky-watching cameras in Belgium, France, Luxembourg, the Netherlands and Germany.

The fireball from space was spotted by a network of sky-watching cameras in Belgium, France, Luxembourg, the Netherlands and Germany.

The fireball from space was spotted by a network of sky-watching cameras in Belgium, France, Luxembourg, the Netherlands and Germany.

The fireball from space was spotted by a network of sky-watching cameras in Belgium, France, Luxembourg, the Netherlands and Germany.

The fireball from space was spotted by a network of sky-watching cameras in Belgium, France, Luxembourg, the Netherlands and Germany.

Researchers have devised a new tool for discerning between naturally occurring viral outbreaks and those resulting from lab accidents.