ANITA Antarctic Impulsive Transient Antenna AESOP Anti-Electron Sub-Orbital Payload LEE Low Energy Electrons University of Delaware Balloon Program Active programs Astrophysics Very High Energy Neutrinos Space Physics Positrons and Electrons Geo-magneto and Space Physics Electrons and Gammas

VERITAS Situated at 1250m altitude at the Whipple Observatory near Tucson All four telescopes operational since March 2007 LS I +61°303

Hose reel Drill tower IceTop tanks A collaboration of 29 institutions from 7 countries building the world’s largest neutrino telescope at the NSF South Pole Station

Particle Theory and Cosmology High Energy Frontier : Large Hadron Collider (LHC) will reach energies which prevailed in the primordial universe (~ sec. ). Far reaching implications for fundamental physics and cosmology. Dark Energy: Comprises 70% of the energy density of the universe; behaves as anti- gravity; otherwise completely mysterious. Dark Matter? Hubble Telescope Dark Energy WMAP Satellite LHC tunnel  Dark Matter : Makes up 25% of the universe' energy density; nature unknown.