Scientists are worried that humanity just keeps sending junk into space

Space is big and the hardware that humans keep sending into the great beyond is comparatively small, but our habit of letting random bits of space vehicles, boosters, and defunct satellites hang around in orbit is starting to concern scientists more than ever before. Now, the European Space Agency is sounding the alarm and pleading with the space-traveling nations to pitch in and help clean up the estimated 150 million bits of debris with the capability to destroy or damage spacecraft that accid...