Rain on ocean.  peace for my soul.

climateadaptation:

itsfullofstars:

Some Strange Things Are Happening To Astronauts Returning To Earth

Tremendous. Surprise ending.

Compelling, and so beautiful!

politicsprose:

Ian Rankin’s Ten Rules for Writing Fiction

1 Read lots.

2 Write lots.

3 Learn to be self-critical.

4 Learn what criticism to accept.

5 Be persistent.

6 Have a story worth telling.

7 Don’t give up.

8 Know the market.

9 Get lucky.

10 Stay lucky.

despicablealexis:

winter storm in yosemite

obliteratedheart:

Little Traveler Mouse by Johana [etsy]

politicsprose:

As Mark Twain’s teenage self would attest: some are born snarky, some achieve snarky, and some have snarky thrust upon them.

1ucasvb:

Different modes of oscillation for a pendulum

The period of a simple pendulum is not a trivial thing, and it depends on the initial conditions.

Shown here are ten different modes of oscillation for the same pendulum. The only difference is the total amount of mechanical energy in the system.

As a result, each one has a completely different period of oscillation, unlike what the small-angle approximation (as taught in high-school) would suggest. They can’t be in sync. You may see some really interesting patterns based on the delay between them in your browser.

The red graph above each pendulum represents the phase portrait for the respective mode of oscillation, with the current state marked as a blue dot. The horizontal axis represents angle (hence why it wraps around the sides) while the vertical axis represents angular velocity.

Pendulums are very interesting dynamical systems, as they are relatively simple to understand but can produce surprisingly complex results in certain cases, such as the chaotic behavior of double pendulums and the odd behavior displayed by coupled pendulums.