This issue was announced by the USPS on December 13^th:

These stamps reveal life on Earth like many have never seen it. Twenty stamps feature 20 different images taken with microscopes and highly specialized photographic techniques that capture details of life undetectable by the human eye. The images show the phenomena of life in exquisitely fine detail. While stunning on their own as works of art, these images also hold scientific significance. Art director Derry Noyes designed the stamps using existing photographs.

We will post additional information as we get it below the line, with the most recent information at the top.

Updated September 5^th:
Here are the Scott catalogue numbers for this issue:
5802 Life Magnified pane of 20
a. (66¢) Red blood cells
b. (66¢) Macaw parrot feather
c. (66¢) Human hair
d. (66¢) Moss leaves
e. (66¢) Arranged diatoms
f. (66¢) Freshwater protozoans
g. (66¢) Acorn barnacle
h. (66¢) Moth antenna
i. (66¢) Diving beetle front foot
j. (66¢) Mouse brain neurons
k. (66¢) Starling bone tissue
l. (66¢) Moth wing scales
m. (66¢) Zebrafish
n. (66¢) Mushroom gills
o. (66¢) Freshwater snail tongue
p. (66¢) Blue button organism
q. (66¢) Mold spores
r. (66¢) Barnacle legs
s. (66¢) Flame lily pollen
t. (66¢) Oak leaf surface

Updated August 11^th:
APS’ Ken Martin speaks during the first-day ceremony:Updated July 11^th:
Here are the first-day postmarks for this issue:The Digital Color Postmark measures 2.73″ x 1.06″.The Pictorial Postmark measures 2.75″ x 1.08″This is the Great American Stamp Show Postmark for August 10th.This is the Americover show postmark for August 10th.

Updated July 7^th:

[press release] [click on any of the pictures for larger versions]
Postal Service to Release Life Magnified Stamps

What: The U.S. Postal Service will commemorate the beauty of the microscopic world with 20 new stamps featuring otherworldly images of some of the smallest components of life as we know it.

The first-day-of-issue event for the Life Magnified Forever stamps will be held at theGreat American Stamp Show in partnership with the American Philatelic Society. The ceremony is free and open to the public. News of the stamp is being shared with the hashtag #LifeMagnifiedStamps.

Who: Luke Grossmann, senior vice president, Finance and Strategy, United States Postal Service
When: Thursday, Aug. 10, 2023, at 11 a.m. EDT

Where:
The Great American Stamp Show
Huntington Convention Center of Cleveland — Hall C
300 Lakeside Ave. ∙ Cleveland, OH 44113

RSVP: Dedication ceremony attendees are encouraged to RSVP at: usps.com/lifemagnified

Background: For hundreds of years, scientists have held deep fascination with making the invisible elements of our world visible. Development of more refined and precise microscopes over several centuries brought smaller and smaller components of life into focus. By the 20th century, microscopes had become ubiquitous in laboratories across the country and around the globe. Electron microscopes are now essential tools in a variety of scientific fields.

The images that result from microscope-based research show, in exquisitely fine detail, the phenomena of life. While stunning on their own as works of art, these images also hold scientific significance.

Microscopists, both professional and amateur, use a variety of techniques to capture the beauty of their subjects.

Derry Noyes, an art director with USPS, designed the stamps and the stamp pane using existing photographs.

The Life Magnified stamps are being issued as Forever® stamps. These Forever stamps will always be equal in value to the current First-Class Mail® one-ounce price

Updated June 29^th from the Postal Bulletin:
On August 10, 2023, in Cleveland, OH, the United States Postal Service® will issue the Life Magnified stamps (Forever® priced at the First-Class Mail® rate) in 20 designs, in a pressure-sensitive adhesive (PSA) pane of 20 stamps (Item 484000). These stamps will go on sale nationwide August 10, 2023, and must not be sold or canceled before the first-day-of-issue. The Life Magnified commemorative pane of 20 stamps must not be split and the stamps must not be sold individually.

The Life Magnified stamps explore life on Earth, as few have ever seen it. Twenty stamps feature different images taken with microscopes and highly specialized photographic techniques that capture details of life undetectable by the human eye. Each stamp includes the name of the specimen that is showcased. Art director Derry Noyes designed the stamps and the stamp pane using existing photographs.

No automatic distribution.

How to Order the First-Day-of-Issue Postmark:
Customers have 120 days to obtain the first-day-of-issue postmark by mail. They may purchase new stamps at their local Post Office™ or at The Postal Store® website at store.usps.com/store/home. They must affix the stamps to envelopes of their choice, address the envelopes (to themselves or others), and place them in a larger envelope addressed to:

FDOI – Life Magnified Stamps
USPS Stamp Fulfillment Services
8300 NE Underground Drive, Suite 300
Kansas City, MO 64144-9900

After applying the first-day-of-issue postmark, the Postal Service™ will return the envelopes through the mail. There is no charge for the postmark up to a quantity of 50. There is a 5-cent charge for each additional postmark over 50. All orders must be postmarked by December 10, 2023.

Technical Specifications:

Issue: Life Magnified Stamps
Item Number: 484000
Denomination & Type of Issue: First-Class Mail Forever
Format: Pane of 20 (20 designs)
Series: N/A
Issue Date & City: August 10, 2023, Cleveland, OH 44101
Art Director: Derry Noyes, Washington, DC
Designer: Derry Noyes, Washington, DC
Existing Photo: Don Komarechka
Existing Photo: David Liittschwager
Existing Photos: Tagide deCarvalho
Existing Photos: Charles Krebs
Existing Photos: Igor Siwanowicz
Existing Photos: Steve Gschmeissner
Existing Photos: Dennis Kunkel
Existing Photos: Jason Kirk
Modeler: Sandra Lane / Michelle Finn
Manufacturing Process: Offset, Flexographic
Printer: Banknote Corporation of America
Press Type: Gallus RCS
Stamps per Pane: 20
Print Quantity: 32,000,000 stamps
Paper Type: Phosphor Tagged Paper, Block
Adhesive Type: Pressure-sensitive
Colors: Cyan, Magenta, Yellow, Black
Stamp Orientation: Horizontal
Image Area (w x h): 1.42 x 0.84 in / 36.068 x 21.336 mm
Overall Size (w x h): 1.56 x 0.98 in / 39.624 x 24.892 mm
Full Pane Size (w x h): 7.25 x 7.25 in / 184.150 x 184.150 mm
Press Sheets Size (w x h): 14.75 x 22.25 in / 374.65 x 565.15 mm
Plate Size: 120 stamps per revolution
Plate Number: “B” followed by four (4) single digits in two corners
Marginal Markings:
Front: Header: Life Magnified • Plate number in bottom two corners
Back: ©2022 USPS • USPS logo • Two barcodes (484000) • Plate position diagram (6) • Promotional text

Updated December 20^th:
The American Philatelic Society says these stamps will be issued at its Great American Stamp Show on the first day of the show, Thursday, August 10.