Novel Techniques for the Generation of Ultrashort Attosecond Pulses of Coherent Radiation

Revealing the laws of Nature often require developing unique experimental tools. In this talk I will discuss new tools that will enable probing of matter with attosecond time resolution and Angstrom spatial resolution. Their emergence is largely due to the spectacular progress in development of x-ray free electron lasers and similar progress in generation of the ultra-short light pulses in optics.