Life and Environments Through Time (LET)
U.S. National Science Foundation · Opportunity number 25-517
Details summarized from the official notice as of Sep 27, 2026. Always confirm eligibility, deadlines and requirements in the official notice before applying.
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Key facts
| Opportunity number | 25-517 |
|---|---|
| Agency | U.S. National Science Foundation |
| Assistance listing (ALN, formerly CFDA) | 47.050 |
| Posted | Dec 7, 2024 |
| Deadline | Not listed |
| Estimated total program funding | $14,000,000 |
| Cost sharing or matching required | No |
| Funding type | Grant |
| Category | Science technology and other research and development |
| Last updated here | Sep 27, 2026 |
Summary from the notice
Who can apply
The official notice lists these applicant types as eligible:
- Others named in the notice (see the eligibility text)
Not listed as eligible
- Small businesses
- Nonprofits
- Colleges and universities
- State governments
- Local governments
- Tribal governments and organizations
- Larger for-profit companies
- Individuals
Unless the eligibility text in the notice names you, this opportunity is probably not for you.
Eligibility details from the notice
*Who May Submit Proposals: Proposals may only be submitted by the following: -Non-profit, non-academic organizations: Independent museums, observatories, research laboratories, professional societies and similar organizations located in the U.S. that are directly associated with educational or research activities. -Institutions of Higher Education (IHEs): Two- and four-year IHEs (including community colleges) accredited in, and having a campus located in the US, acting on behalf of their faculty members. Special Instructions for International Branch Campuses of US IHEs: If the proposal includes funding to be provided to an international branch campus of a US institution of higher education (including through use of sub-awards and consultant arrangements), the proposer must explain the benefit(s) to the project of performance at the international branch campus, and justify why the project activities cannot be performed at the US campus.
Registrations you will likely need
Most applications submitted through Grants.gov need the following. Registration can take several weeks, so start early. The notice lists the exact requirements.
- SAM.gov registration for your organization, which also gives you a Unique Entity ID (UEI). Registration is free.
- A Login.gov account, which Grants.gov uses for sign-in.
- A Grants.gov applicant registration linked to your organization's UEI.
Past awards for this program
Totals for assistance listing 47.050 from public USASpending.gov data, as of Sep 23, 2026. Past awards do not predict future funding.
| Year | Listing | Awards | Total | Average |
|---|---|---|---|---|
| 2026 | 47.050 | 19 | $1,656,677,479 | $87,193,552 |
| 2025 | 47.050 | 19 | $1,686,276,931 | $88,751,417 |
| 2024 | 47.050 | 22 | $1,880,603,178 | $85,481,963 |
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