PIX4606551: Mars Exploration Rover - Artist's View - Mars Exploration Rover is a Martian exploration mission composed of two probes housing two identical rovers, Spirit and Opportunity MER - A, the Spirit robot launched on June 10, 2003, landed on January 3, 2004 in the Gusev crater. MER - B, the Opportunity robot launched on July 8, 2003, landed on January 24, 2004 on Meridiani Planum / Bridgeman Images
PIX4583790: The disappearance of dinosaurs - Artist view - Tylosaur and KT Event - Artist view - Impact of the asteroid responsible for the disappearance of dinosaurs about 65 million years ago. In the foreground, a tylosaurus, a large carnivorous marine lezard. The very end of the Mesozoic is marked by evidence of a devastating asteroid impact 65 million years ago, which is termed the KT event, referring to the Cretaceous (K) -Tertiary (T) transition. This impact likely contributed to the demise of the dinosaurs, although recent findings call into question how decisive the blow actually was. In this image, a huge tylosaur, a relative of today's varanid lizards such as the Komodo dragon, faces its last few minutes of existence in a Texas lagoon. Over the horizon looms the rising ejecta from the KT impact, which occurred in what is today the Yucatan / Bridgeman Images