File this under "space stuff is neat": these thermal tiles are used on the outside of the space shuttle to protect it on re-entry. They dissipate heat so quickly that the scientists can easily handle them just seconds after they are removed from a 2200° oven.

In a curious coincidence, two of the most popular presidential candidates share a particular linguistic tic – the inability to say the letter "H" before the letter "U" – a fact that has not gone unnoticed by the media, the candidates, and their supporters.

PBS Spacetime explains today's ground breaking detection of gravity waves, verifying the final major prediction in Einstein's theory of general relativity over 100 years after it was proposed.

This exasperated expression is often used in reaction images and animated GIFs to indicate a sense of emotional exhaustion.