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Truly crappy weather cancels a tour. Call to find out or learn how to read the weather!

Nov
4
Tue
2014
Mission District Water Walking
Nov 4 @ 1:00 PM – 4:00 PM

Thinkwalks presents an exploration walk:

Mission District Water Walking

Explore along water routes where creeks once flowed, before the city grew up. Some are still flowing, hidden. We’ll discuss the practical side and politics of local drinking water, sewers, wells, hydrants and reservoirs. Joel will debunk myths about early SF water and help you see the land forms in a new way.

Bronze plaque

We’ll debunk this bronze claim, fast!

We’ll end near Church Street Station. Dress warmly if it’s windy. Maximum 15 people.

⭐ Rain or shine

⭐ RSVP required

⭐ $10 low income to $40 standard (see below)

Payment Scale

At the end of your Thinkwalk if you can’t afford the standard $40 please feel free to pay a lower amount, on a sliding scale going from the standard price down to no lower than $10.

 

Nov
18
Tue
2014
Park History Walk Deep in Manure
Nov 18 @ 1:30 PM – 4:00 PM

Thinkwalks presents an exploration walk:

Park History Walk Deep in Manure

The Park was built with rich waste from 19th Century street sweepings on what was considered a poor wasteland of shifting sand dunes.

We’ll walk and explore natural mysteries and political histories. A living fossil species of redwood? A quarry-turned-pond-turned-pregnancy-test-eradication-zone?  Yes, amazingly.

We’ll also see historic photos at the sites of… A mini Brooklyn Bridge? A railroad right-of-way in the Park? And a virtually unknown sketch for a superhighway from 1928? Yes, true!

Walk the gentle hills. Appreciate how the dunes became today’s lush garden. We’ll unearth how the Park was made, and make it even more ours.

⭐ Rain or shine

⭐ RSVP required

⭐ $10 low income to $40 standard (see below)

Payment Scale

At the end of your Thinkwalk if you can’t afford the standard $40 please feel free to pay a lower amount, on a sliding scale going from the standard price down to no lower than $10.

Nov
20
Thu
2014
Sky Phenomema
Nov 20 @ 7:30 PM – 9:00 PM

Thinkwalks and SF Natural History Series present:

A talk at the Randall Museum

Sky Phenomena

Joe Jordan will come back with new material after having really wowed and inspired us with his slides on this topic in 1997.

Joe is the kind of excitable guy who, when he sees the conditions are just right for unusual cloud formations at the North Pole, hops on a specially instrumented plane commandeered from NASA just so he can go photograph and study them. (Well, he did, back when he was working at NASA Ames.)

Joe has recently focused his attention on energy planning and will regale us with some details of that project as an added treat.

Check back here for further details closer to the event date.

⭐ No need to RSVP—Just show up!

Jan
15
Thu
2015
Ice Plants, Mattress Wireweed & Other Onslaughts
Jan 15 @ 7:30 PM – 9:00 PM

Thinkwalks and SF Natural History Series present:

A talk at the Randall Museum

Ice Plants, Mattress Wireweed & Other Onslaughts

Have you seen how much of the coastal parkland is now covered in succulent ground cover, hardy New Zealand vines and just too many highly invasive species? Come hear Lew Stringer give us the low down on ground cover invasive plants. He’s been working with the Presidio Trust, and before that the Golden Gate National Recreation Area, to develop strategies to manage the various species that would take everything over if they managed themselves.

Lew will give us a presentation and the usual discussion will ensue about the creepy plants that seem to be creeping all over the place. Invasives aren’t 100% evil. They’re 100% complex and give a real challenge to restoration efforts in the parks.

⭐ No need to RSVP—Just show up!

Feb
19
Thu
2015
SF Carbon Cycles, Humans & the Climate
Feb 19 @ 7:30 PM – 9:00 PM

Thinkwalks and SF Natural History Series present:

A talk at the Randall Museum

SF Carbon Cycles, Humans & the Climate

John’s making great strides in organizing plans with everyone from the mayors’ conference to the White House. Come hear what you can do, what the city is planning, and how the Randall Museum will be part of a demonstration project on carbon dioxide. We’ll discuss the whole carbon cycle with an eye to making major changes in all human-carbon usage systems: human nutrition, organic waste streams, soil health options, wealth & economics, and carbon credits protocols. Let’s talk about the human relationship to carbon and what it means to stopping and reversing global warming.

⭐ No need to RSVP—Just show up!

Mar
19
Thu
2015
The Most Extreme Storms Yet
Mar 19 @ 7:30 PM – 9:00 PM

Thinkwalks and SF Natural History Series present:

A talk at the Randall Museum

The Most Extreme Storms Yet

Joel Pomerantz of Thinkwalks on the big stage! (It’s actually the last Natural History Talk that will take place in the intimate space of the Randall Museum Theater before a year of renovation begins.)

Joel will share his research on the weather disaster that determined so much of what’s around you today. In early 1862 the sky dumped upwards of ten feet of rain in the mountains (about four feet in San Francisco). In the middle of that, there was a hard freeze for a week down to sea level. Thousands died. Dead cattle and cord-wood piled up on Bay Area beaches, washed out from the river system. No previous research has done so much to connect the dots. Come learn about the widespread disaster that spanned more than four states (before all were states), changed the course of rivers, destroyed the California economy and brought in invasive grasses, among other stunning details.

⭐ No need to RSVP—Just show up!

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