Science

The Dragon capsule has successfully detached from the International Space Station and is headed toward a splashdown in the Pacific that should happen around 11:45 a.m. ET.

David Greene speaks with NPR's Joe Palca about Morning Edition's upcoming series, "Summer Science."

Here's something simple to think about (not).

Think about "now." Too late, it's already become "then."

"Now" on the sun takes 8 minutes to get to Earth. It still looks like a "now." But it's a then.

When a mosquito bites you "now," it takes a teeny amount of time for that "now" to reach your brain.