Abstract collage of science-related imagery

Life and Environments Through Time (LET)

View guidelines

NSF 25-517

Important information about NSF’s implementation of the revised 2 CFR

NSF Financial Assistance awards (grants and cooperative agreements) made on or after October 1, 2024, will be subject to the applicable set of award conditions, dated October 1, 2024, available on the NSF website. These terms and conditions are consistent with the revised guidance specified in the OMB Guidance for Federal Financial Assistance published in the Federal Register on April 22, 2024.

Important information for proposers

All proposals must be submitted in accordance with the requirements specified in this funding opportunity and in the NSF Proposal & Award Policies & Procedures Guide (PAPPG) that is in effect for the relevant due date to which the proposal is being submitted. It is the responsibility of the proposer to ensure that the proposal meets these requirements. Submitting a proposal prior to a specified deadline does not negate this requirement.

Supports research on the origin and evolution of Earth's climate, environments and life, improving our understanding of past processes to predict future global changes and support ecosystem sustainability.

Supports research on the origin and evolution of Earth's climate, environments and life, improving our understanding of past processes to predict future global changes and support ecosystem sustainability.

Synopsis

The Life and Environments Through Time (LET) program supports research that advances knowledge about the patterns and processes relating to the origin and evolution of Earth’s climate, environments, life, and sedimentary record. This research takes place at the molecular, local, regional, and global scales from the Archean Eon through the Holocene epoch. LET-supported research can be useful for predicting and planning for future global change, and for the maintenance and security of ecosystem services and human societies.

Program contacts

Name Email Phone Organization
Margaret Fraiser
mfraiser@nsf.gov (703) 292-4660 GEO/EAR
Jonathan G. Wynn
jwynn@nsf.gov (703) 292-4725 GEO/EAR
Yurena Yanes
yyanes@nsf.gov (703) 292-2649 GEO/EAR

Awards made through this program

Browse projects funded by this program
Map of recent awards made through this program