4 He age discordance and release behavior of a double shell botryoidal hematite from the Schwarzwald, Germany

4 He diffusion in 40 Ar-retentive minerals

4-critical wheel graphs of higher order

4-D evolution of SE Asia's mantle from geological reconstructions and seismic tomography

4-D Variational Assimilation of Mars Global Surveyor Meteorological Observations

4-Dimensional black holes from Kaluza-Klein theories

4-dimensional locally CAT(0)-manifolds with no Riemannian smoothings

4-dimensional symplectic contractions

4-manifolds as covers of the 4-sphere branched over non-singular surfaces

4-Manifolds without Einstein Metrics

4-regular and self-dual analogs of fullerenes

4-valent plane graphs with 2-, 3- and 4-gonal faces

4-webs in the plane and their linearizability

4.5-year CMB Power Spectrum from the Cosmic Background Imager

40 Ar / 39 Ar ages of biotite and hornblende from a progressively remetamorphosed basement terrane: their bearing on interpretation of release spectra

40 Ar/ 39 Ar age spectra of some undisturbed terrestrial samples

40 Ar/ 39 Ar studies of deep-sea igneous rocks

40 Ar/ 39 Ar thermochronometry of K-feldspar from the KTB borehole, Germany

40 YEARS OF PULSARS: Millisecond Pulsars, Magnetars and More

400My of Deformation Along Tibet Active Strike Slip Faults