Whether space-time exists should neither be controversial nor even conceptually challenging, given the definitions of “space-time,” “events” and “instants.” The id ...

Space-time is the map of where and when events happen. A worldline is the record of every event that occurs throughout one’s life. The key question is whether the map — or all the events it draws ...

Panasonic has unveiled the Lumix 100-500mm f/5-7.1 O.I.S., its most powerful zoom lens yet for full-frame L-mount cameras.

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