In this video for PragerU, Stephen Meyer gives a quick summary of “two serious doubts about modern Darwinian theory”:
The Cambrian Explosion: The sudden appearance of new animals which evolutionary theory has failed to explain.
The DNA enigma: The implausibility of random mutations producing the information needed to build new forms of animal life.
For more on this topic, see Meyer’s book Darwin’s Doubt or Douglas Axe’s Undeniable.