Saturday, September 12

76° / 60°Sunny, clouding lateSunset 7:01 PM

The last dry day for a while. Sunday brings half an inch of rain and thunder.

Now, 4 cards

Today and tonight

Look closer

Jewelweed is flinging next year's seeds, and you can set one off

Along damp shady edges, the fat green pods under jewelweed's orange flowers are coiled springs. Touch a ripe one and it fires its seeds several feet, which is how the plant sows next year's patch.

Any time today

5-minute walkkidsfree

Look closer

The monarchs crossing the yard now are flying to Mexico

Monarchs that emerged after mid-August skip breeding altogether and live for months instead of weeks. The one on your goldenrod is fuelling up for a flight to a few mountain forests in central Mexico.

Warm part of the day

from homekidsfree

Right outside

The sun's rays fan out of the clouds tonight, but they are parallel

Clouds thicken this evening ahead of tomorrow's rain, and a low sun behind a broken deck sends bright shafts across the sky. They look like a fan opening out of the sun, and that spreading is only perspective.

6:30-7:15pm

from homekidsfree

Look closer

Both river gauges are low, and tomorrow is the first real refill

The Assabet at Maynard was running 21 cubic feet a second at five this morning, and the Sudbury at Saxonville about 10. Tomorrow drops half to three quarters of an inch onto ground that has been drinking it straight down.

Any time today

5-minute walkkidsfree

This Week, 4 cards

Tomorrow through Sep 19

Go see

Tagging monarchs by hand before they leave, September 19

At Wachusett Meadow you help catch a monarch, stick a numbered tag on its wing and let it go. If somebody in Mexico finds that tag this winter, the record is yours.

Sat Sep 19, 1-3pm

worth the drivekidsticketed

Look closer

Compare the acorns under three different oaks after the rain

Oak crops swing wildly from tree to tree and year to year, and a few trees make most of the acorns in any patch of wood. Tomorrow's wind and rain will shake this year's answer onto the ground.

Mon-Wed, after the rain

5-minute walkkidsfree

Go see

A walk for the wild plants you can make tea from, September 17

A naturalist walks you around Belmont naming the common plants that can go in a cup, and the invasive ones that took the ground those plants grow on. Gentle pace, two hours, adults only.

Thu Sep 17, 10am-12pm

worth the driveticketed

Go see

Oyster mushrooms from spawn to fruiting, at Goodnow Library

A fungus spends nearly all of its life as a thread network eating wood out of sight, and fruiting is the short visible part. This session sends you home with a live culture so you can watch that happen on your own shelf.

Thu Sep 17, 6:30-8:30pm

15-minute driveindoor

Plan Ahead, 2 cards

Sep 20 and beyond

Coming soon

The equinox is September 23, and it is not the equal-length day

Day and night even up a few days after the equinox rather than on it. Sunrise and sunset are timed off the sun's upper edge, and the air bends its light enough that you see it before it has really risen.

Sep 23, then a few days

from homekidsfree

Coming soon

Club telescopes in the sculpture field for the equinox, Sep 20

The Aldrich Astronomical Society sets up on the open fields at deCordova and turns its scopes on whatever the season has brought up. Tickets go by the carload rather than by the head.

Sun Sep 20, 7:30-9:30pm

15-minute drivekidsticketed

That's what's worth noticing right now. Go have a look.

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